1. If grams of the vapor of a volatile liquid can fill a 498 ml flask at o C and 775 mm Hg, what is the molecular mass of the gas?
|
|
- Matthew Chapman
- 5 years ago
- Views:
Transcription
1 MOLECULAR MASS OFA VOLATILE LIQUID A lab to study the ideal gas law Introduction The ideal gas law indicates that the observed properties of a gas sample are directly related to the number of moles of gas sample in the container. For a given pressure, volume and temperature there is a set number of moles that will be present. If we can measure the number of grams of gas present in a container and calculate the number of moles present, the molecular mass of the gas can be determined. In this lab, we will use a highly volatile liquid and study its properties as a gas. A small amount of liquid will be placed in a flask and heated until it completely evaporates. Once it fills the flask, we can measure its temperature (it will be immersed in boiling water), pressure (same as the pressure in the lab at that time), and volume (by filling the flask). Once the sample is allowed to cool, the gas will recondense and the mass of the sample needed to fill the flask can be found. Using the ideal gas law, PV=nRT, and the data recorded, the molecular mass of the volatile liquid can be determined. Prelab questions: 1. If grams of the vapor of a volatile liquid can fill a 498 ml flask at o C and 775 mm Hg, what is the molecular mass of the gas? 2. What is the density of the gas at the time of collection?
2 Set-up an adapted Dumas method: Ring Thermometer And Test Tube Clamp Al foil cap with SMALL pinholesecured with a rubber band 125 ml Erlenmeyer flask Volatile Liquidenough to cover the bottom of flask 600 ml beaker Hot Plate MOLECULAR MASS OFA VOLATILE LIQUID 1. Place a small pinhole in the Al foil square. 2. Assemble the pictured apparatus a clean, dry 125 ml Erlenmeyer flask, fitted with the Al foil square containing the pinhole. Carefully secure it over the mouth of the Erlenmeyer flask with the rubber band. 3. On an analytical balance, weigh (_.xxxx g) the apparatus assembled in step 2.
3 4. Partially fill (about 3 4) a clean 600 ml beaker with water (tap water is fine) and place it on a hot plate. Bring the water just to boiling. 5. Meanwhile, remove the rubber band and foil cap from the Erlenmeyer flask, and place 4-5 ml of the volatile liquid in the Erlenmeyer flask - the exact amount is not important as long it completely covers the bottom of the flask. Then replace the foil cap and rubber band. 6. Once the water in the beaker is brought to boiling, remove the Bunsen burner and clamp the assembled apparatus to the ring stand by its neck with the test tube clamp. [The amount of water in the beaker can be adjusted such that when the final set-up is fully assembled, the Erlenmeyer flask is submerged up to its neck just an inch or so below the top - in the water bath in the beaker.] 7. Using a second test tube clamp, secure a thermometer and position it in the water bath in the beaker such that it can monitor the water bath temperature without touching either the sides of the beaker nor the Erlenmeyer flask. 8. Return the hot plate beneath the set-up and gently maintain such that the thermometer registers a steady temperature somewhere between 85 o C and 95 o C. It should not be boiling. Be sure that the Erlenmeyer flask is submerged up to its neck. 10. The volatile liquid should steadily begin to vaporize. You can monitor the escaping excess vapor by looking at its vapor trail as it exits the pinhole. [Another way to monitor the escaping vapor is to place the blade of the spatula over the pinhole and notice the condensation like your breath on a mirror.] 11. When you notice the vapor trail has ceased to escape from the pinhole, remove the Bunsen burner and immediately record the temperature on the thermometer to the tenth s place (_.x o C). 12. Allow the system to cool to room temperature. Then carefully unclamp the the Erlenmeyer flask still covered with the foil cap and rubber band from the water bath. If it is still warm to the touch, you may set it on the bench top on the wire gauze. 13. Once cooled, completely dry the outside of the covered Erlenmeyer flask and
4 weigh it on the same analytical balance (_.xxxx g). [By the way, when the system is cooled, you should notice that there is some liquid on the bottom of the Erlenmeyer flask but less than the initial amount. Why is this?] 14. Once you have completed step 13 remove the foil cap and rubber band from the Erlenmeyer flask and properly dispose of any remaining volatile liquid. 15. Rinse out the Erlenmeyer flask be sure that it is dry. 16. Weigh the clean, dry Erlenmeyer flask on a balance and record its mass 17. Now fill the Erlenmeyer flask with water (tap is fine) to the brim using a buret to measure the volume. Dry the outside if it is wet. Weigh the water-filled Erlenmeyer flask on the same balance and record its mass Also, record the temperature of the water in the filled Erlenmeyer flask on the thermometer to the tenth s place (_.x o C). 19. Clean Up Discard the liquid in the appropriate container, clean and return glassware to appropriate location. 20. Be sure to obtain and record the barometric pressure before you leave the lab. Calculations 1. Summarize data collected in a table. 2. Calculate the molecular mass of the volatile liquid studied. Show all conversions and calculations with units. 3. Calculate the percent error of your determination, the class average, and the class percent error. 4. Discuss the effect of each of the following possible errors on the results of this lab, including an EXPLANATION of how the error will affect the calculated molecular mass. a. Removing the flask from the hot water bath prematurely, leaving some of the unknown in the liquid phase. b. Not completely drying off the flask and foil before massing it. c. Loosening the aluminum foil before massing the flask, or having the rubber band break, with the same effect. d. Removing the flask from the hot water bath before the temperature of the flask reaches the temperature of the hot water bath. e. Heating the flask for too long after the volatile liquid has evaporated
5 5. Represent, in diagram #1, the flask with the original liquid in it. The liquid should be represented as molecules. Label. Represent, in diagram #2, the flask immediately after heating has been completed, including any molecules that may have escaped the flask. Represent all molecules used in diagram #1. Conclusion with support from data Validity Address, in detail, the techniques and procedures that contributed to the validity of your lab results. You may refer to your percent error in your discussion. Also, refer to the class results, since these represent more trials of the same procedure. Is the validity of your lab supported or not supported? DISCUSS possible sources of error and their EFFECTS upon results. Then address each source of error in your improvements. The improvement must be directly correlated with experimental procedure. There are numerous sources of error in this lab, but only address those that could reasonably happen.
Experiment 13 Molar Mass of a Gas. Purpose. Background. PV = nrt
Experiment 13 Molar Mass of a Gas Purpose In this experiment you will use the ideal gas law to calculate the molar mass of a volatile liquid compound by measuring the mass, volume, temperature, and pressure
More informationEXPERIMENT 8 Ideal Gas Law: Molecular Weight of a Vapor
EXPERIMENT 8 Ideal Gas Law: Molecular Weight of a Vapor Purpose: In this experiment you will use the ideal gas law to calculate the molecular weight of a volatile liquid compound by measuring the mass,
More information11.1 Dumas Method - Pre-Lab Questions
11.1 Dumas Method - Pre-Lab Questions Name: Instructor: Date: Section/Group: Show all work for full credit. 1. If a 275-mL gas container has pressure of 732.6 mm Hg at -28 C, how many moles of gas are
More informationCHM 2045L Physical Properties
CHM 2045L Physical Properties Purpose: To observe and record some common physical properties. Background: Physical properties can tell us a lot about an unknown chemical. In this experiment you will look
More informationGas Laws. Introduction
Gas Laws Introduction In 1662 Robert Boyle found that, at constant temperature, the pressure of a gas and its volume are inversely proportional such that P x V = constant. This relationship is known as
More informationAnalysis of a KClO3 Mixture and Determination of R
Experiment 10 Analysis of a KClO3 Mixture and Determination of R Pre-Lab Assignment Before coming to lab: Read the lab thoroughly. Answer the pre-lab questions that appear at the end of this lab exercise.
More informationPRE LABORATORY ASSIGNMENT: Lab Section Score: /10 READ THE LAB TEXT BEFORE ATTEMPTING THESE PROBLEMS!
EXPERIMENT # 6 Name: PRE LABORATORY ASSIGNMENT: Lab Section Score: /10 READ THE LAB TEXT BEFORE ATTEMPTING THESE PROBLEMS! 1. Calculate the height of a corresponding column of mercury (in mm) that is at
More informationGas Laws. Figure 1: Experimental Set-up with Leveling Bulb. GCC CHM 151LL: Gas Laws GCC, 2019 page 1 of 8
Gas Laws Introduction Although we cannot see gases, we can observe their behavior and study their properties. This lab will apply several concepts from Ideal Gas Laws. You will use your knowledge of chemical
More informationAdditional Reading General, Organic and Biological Chemistry, by Timberlake, chapter 8.
Gas Laws EXPERIMENTAL TASK Determine the mathematical relationship between the volume of a gas sample and its absolute temperature, using experimental data; and to determine the mathematical relationship
More informationBoyle s Law VC 09. Experiment 9: Gas Laws. Abstract
Experiment 9: Gas Laws VC 09 Abstract In this laboratory activity, you will experimentally confirm Boyle s Law, determine absolute zero from Gay-Lussac's Law, and determine the molecular weight of acetone,
More informationDetermination of R: The Gas-Law Constant
Determination of R: The Gas-Law Constant PURPOSE: EXPERIMENT 9 To gain a feeling for how well real gases obey the ideal-gas law and to determine the ideal-gas-law constant R. APPARATUS AND CHEMICALS: KClO
More informationGas Laws. 2 HCl(aq) + CaCO 3 (s) H 2 O(l) + CO 2 (g) + CaCl 2 (aq) HCl(aq) + NaHCO 3 (s) H 2 O(l) + CO 2 (g) + NaCl(aq)
Gas Laws Introduction: Although we cannot see gases, we can observe their behavior and study their properties. For example, we can watch a balloon filled with helium gas floating in air and conclude that
More informationThe Ideal Gas Constant
Chem 2115 Experiment # 8 The Ideal Gas Constant OBJECTIVE: This experiment is designed to provide experience in gas handling methods and experimental insight into the relationships between pressure, volume,
More informationStudent s Name: Date : Molar volume of butane
Student s Name: Date : Background Molar volume of butane The purpose of this activity is to determine the molar mass of butane using gas from a butane lighter. The experiment depends on the fact that the
More informationGas Laws. 2 HCl(aq) + CaCO 3 (s) H 2 O(l) + CO 2 (g) + CaCl 2 (aq) HCl(aq) + NaHCO 3 (s) H 2 O(l) + CO 2 (g) + NaCl(aq)
Gas Laws Introduction: Although we cannot see gases, we can observe their behavior and study their properties. For example, we can watch a balloon filled with helium gas floating in air and conclude that
More informationIntroduction to Gas Laws Lab NAME: DATE: PERIOD:
Introduction to Gas Laws Lab NAME: DATE: PERIOD: Background: In a gas, particles are spread far apart; therefore a gas takes up more volume than a solid or a liquid. For example, water in the form of steam
More informationIntermolecular Forces
Experiment 2 Intermolecular Forces Prepared by Ross S. Nord, Eastern Michigan University with large parts adapted from Chemistry with Computers by Dan D. Holmquist and Donald D. Volz PURPOSE The purpose
More informationExperiment 1 Introduction to Some Laboratory Measurements
Experiment 1 Introduction to Some Laboratory Measurements Introduction In this experiment you will familiarize yourself with the English & metric systems of measurement, weigh with a centigram balance,
More informationMeasuring Mass and Volume
Measuring Mass and Volume Experiment 2 Expt 2 Measurement.wpd INTENT The purpose of this experiment is to introduce some fundamental aspects of the measurement making process as well as to introduce some
More informationExperiment 12: MOLAR VOLUME OF AN IDEAL GAS
Experiment 1: MOLAR VOLUME OF AN IDEAL GAS Purpose: Determine the molar volume of a gas at standard temperature and pressure (STP, 0 C and pressure of 1 atm) Performance Goals: Collect and measure the
More informationExperiment #12. Gas Laws.
Goal To observe gas laws in the laboratory. Experiment #12. Gas Laws. Introduction All ideal gases, regardless of molar mass or chemical properties, follow the same gas laws under most conditions. Gas
More informationCHM111 Lab Gas Laws Grading Rubric
Name Team Name CHM111 Lab Gas Laws Grading Rubric Criteria Points possible Points earned Lab Performance Printed lab handout and rubric was brought to lab 3 Safety and proper waste disposal procedures
More informationExperiment #2. Density and Measurements
Experiment #2. Density and Measurements Goals 1. To measure and record length, volume and mass accurately with the correct number of significant figures 2. To use significant figures correctly in calculations.
More informationDetermination of the Gas-Law Constant (R) using CO2
Determination of the Gas-Law Constant (R) using CO2 EXPERIMENT 11 Prepared by Edward L. Brown and Miranda Raines, Lee University The student will become familiar with ideal gases and how their properties
More informationThe Decomposition of Potassium Chlorate
The Decomposition of Potassium Chlorate Small quantities of molecular oxygen (O 2 ) can be obtained from the thermal decomposition of certain oxides, peroxides, and salts of oxoacids. Some examples of
More informationVapor Pressure of Liquids
Vapor Pressure of Liquids In this experiment, you will investigate the relationship between the vapor pressure of a liquid and its temperature. When a liquid is added to the Erlenmeyer flask shown in Figure
More informationPart 1: Distillation and Analysis of an Unknown Alcohol Mixture
Experiment DE: Part 1 Experiment DE has multiple goals, including -separation and quantification of a 2-component mixture (fractional distillation and GC); preliminary ID of both components -preparation
More informationCHM 100 / Introductory Laboratory Experiment (r10) 1/11
CHM 100 / 110 - Introductory Laboratory Experiment (r10) 1/11 Purpose This introductory exercise will familiarize you with a few of the measurements we make in the chemistry laboratory and the level of
More informationObjective To identify a pure liquid substance using the physical properties of solubility, density, and boiling point.
Chemistry 1020 Identification of an Unknown Liquid Objective To identify a pure liquid substance using the physical properties of solubility, density, and boiling point. Text reference solubility, density,
More informationPRESSURE-TEMPERATURE RELATIONSHIP IN GASES
PRESSURE-TEMPERATURE RELATIONSHIP IN GASES LAB PS2.PALM INTRODUCTION Gases are made up of molecules that are in constant motion and exert pressure when they collide with the walls of their container. The
More informationEXPERIMENT 1 BASIC LABORATORY TECHNIQUES AND TREATMENT OF DATA MEASUREMENTS
EXPERIMENT 1 BASIC LABORATORY TECHNIQUES AND TREATMENT OF DATA MEASUREMENTS Introduction In the following experiment you will be required to use a Bunsen burner, balance, a pipet, graduated cylinder, flask,
More informationPearson Education Limited Edinburgh Gate Harlow Essex CM20 2JE England and Associated Companies throughout the world
Pearson Education Limited Edinburgh Gate Harlow Essex CM20 2JE England and Associated Companies throughout the world Visit us on the World Wide Web at: www.pearsoned.co.uk Pearson Education Limited 2014
More informationGeneral Chemistry I Percent Yield of Hydrogen Gas From Magnesium and HCl
Introduction For chemical reactions involving gases, gas volume measurements provide a convenient means of determining stoichiometric relationships. A gaseous product is collected in a long, thin graduated
More informationEXPERIMENT 2. Laboratory Procedures INTRODUCTION
EXPERIMENT 2 Laboratory Procedures INTRODUCTION Begin each experiment by taking the necessary safety precautions. All materials that will not be used in the lab should be placed out of the laboratory working
More informationR: The Ideal Gas Constant Pre-Lab Assignment
R: The Ideal Gas Constant Pre-Lab Assignment Read the entire laboratory investigation and the relevant pages in your textbook, then answers the questions that follow in the space provided below. 1 Describe
More informationThe use of the analytical balance, and the buret.
1211L Experiment 1. Density 2015 by H. Patterson Instructor Notes: Students make measurements individually then share data to make the graph. There are four volumetric measurements to be studied; 3.00
More informationTEMPERATURE S RELATIONSHIP TO GAS & VAPOR PRESSURE
TEMPERATURE S RELATIONSHIP TO GAS & VAPOR PRESSURE Adapted from "Chemistry with Computers" Vernier Software, Portland OR, 1997 ELECTRONIC LABORATORY NOTEBOOK (ELN) INSTRUCTIONS Read the directions and
More informationVOLUMETRIC TECHNIQUES
REVISED 10/14 CHEMISTRY 1101L VOLUMETRIC TECHNIQUES Volume measurements are important in many experimental procedures. Sometimes volume measurements must be exact; other times they can be approximate.
More informationCHM Introductory Laboratory Experiment (r17sd) 1/13
CHM 110 - Introductory Laboratory Experiment (r17sd) 1/13 Purpose This introductory exercise will familiarize you with a few of the measurements we make in the chemistry laboratory and the level of uncertainty
More informationEXPERIMENT 1 TOOLS FOR LAB MEASUREMENT
EXPERIMENT 1 TOOLS FOR LAB MEASUREMENT INTRODUCTION A course in chemistry, one of the physical sciences, differs from a course in, say, literature or history. A main difference is that chemistry usually
More informationBASIC LABORATORY TECHNIQUES (Revised )
BASIC LABORATORY TECHNIQUES (Revised 1-2-16) (See Appendix II: Summary for making Spreadsheets and Graphs with Excel and Appendix III parts C, C1 and C2: Significant figures, scientific notation and rounding)
More informationHands-On Experiment Density and Measurement
Hands-On Experiment Density and Measurement GOALS: 1. To measure liquid volume as accurately as possible with graduated cylinders. 2. To measure the volume of irregular shaped solid objects by liquid volume
More informationIntroduction. Objectives. Hazards. Procedure
Experiment: Exploring Gases Note to Students: Check with your instructor to see which parts of this lab (Parts A, B, or C) you will complete. Introduction Gases are made up of molecules that are in constant
More informationCompleted ALL 2 Warm-up IC Kinetic Molecular Theory Notes. Kinetic Molecular Theory and Pressure Worksheet
Name: Unit 10- Gas Laws Day Page # Description IC/HW Due Date Completed ALL 2 Warm-up IC 1 3 5 Kinetic Molecular Theory Notes IC 1 6 8 Kinetic Molecular Theory and Pressure Worksheet IC 2 9 10 Gas Law
More informationBASIC LABORATORY TECHNIQUES (Revised )
BASIC LABORATORY TECHNIQUES (Revised 1-6-13) A. WEIGHING The determination of the quantity of matter in a sample is most directly determined by measuring its mass. The process by which we determine the
More informationQuestion McGraw-Hill Ryerson Limited
Question 1 Which of the following cannot be explained by considering the empty space between the particles of a gas? A) Gases are more compressible than liquids. B) Gases have lower viscosities than liquids.
More informationThe Determination of the Value for Molar Volume
Name AP Chemistry The Determination of the Value for Molar Volume Objective Using a chemical reaction that produces a gas, measure the appropriate values to allow a determination of the value for molar
More informationLaboratory Activity Measurement and Density. Average deviation = Sum of absolute values of all deviations Number of trials
Laboratory Activity Measurement and Density Background: Measurements of mass and volume are very common in the chemistry laboratory. The analytical balance is used to measure mass, and the graduated cylinder,
More informationGas Laws: Boyle s and Amonton s Laws Minneapolis Community and Technical College v.9.08
Gas Laws: Boyle s and Amonton s Laws Minneapolis Community and Technical College v.9.08 I. Introduction The purpose of this experiment is to test the extent real gases (to the limits of our measurements)
More informationSOLUBILITY OF A SOLID IN WATER
1516L Experiment 2 SOLUBILITY OF A SOLID IN WATER Objectives In this experiment you will determine the solubility of potassium nitrate (KNO 3 ) in water at various temperatures. You will prepare a plot
More informationName Period Date. Lab 5: The Molar Volume of a Gas
Name Period Date Lab 5: The Molar Volume of a Gas Objective: To determine the actual molar volume of oxyen as To determine an experimental value for the universal as constant Introduction To calculate
More informationLABORATORY TECHNIQUES. Pouring Liquids
LABORATORY TECHNIQUES Working in the chemistry laboratory you will be handling potentially dangerous substances and performing unfamiliar tasks. This section provides you with a guide to the safe laboratory
More informationGas Laws: Boyle s and Amonton s Laws MCTC Chemistry v.9.17
Gas Laws: Boyle s and Amonton s Laws MCTC Chemistry v.9.17 Objective: The purpose of this experiment is confirm Boyle's and Amontons' Laws in the laboratory. Prelab Questions: Read through this lab handout
More informationFun with Gas Laws. Prepared by Vance O. Kennedy and Ross S. Nord, Eastern Michigan University PURPOSE
Experiment 2 Fun with Gas Laws Prepared by Vance O. Kennedy and Ross S. Nord, Eastern Michigan University PURPOSE The purpose of this laboratory experience is to explore the gas law relationships between
More informationVapor Pressure of Liquids
Experiment 10 In this experiment, you will investigate the relationship between the vapor pressure of a liquid and its temperature. When a liquid is added to the Erlenmeyer flask shown in Figure 1, it
More information1. Quantity of a gas (moles) 2. Temperature of the gas. 3. Volume occupied by the gas. 4. Pressure exerted by the gas. PV = nrt
Experiment 5 Stoichiometry : Gases Determining the Ideal Gas Constant Lab Owl Announcement: Upon completion of this lab log onto OWL. Your fourth Lab Owl assignment, Lab Owl: Exp 5 should appear there.
More informationTHERMODYNAMICS OF A GAS PHASE REACTION: DISSOCIATION OF N 2 O 4
THERMODYNAMICS OF A GAS PHASE REACTION: DISSOCIATION OF N 2 O 4 OBJECTIVES 1. To measure the equilibrium constant, enthalpy, entropy, and Gibbs free energy change of the reaction N2O4(g) = 2 NO2(g). 2.
More informationLab Equipment ANALYTICAL BALANCE
Lab Equipment ANALYTICAL BALANCE Analytical balances are used for very accurate, quantitative measurements of mass to the nearest 0.001 g. (Some read to 0.0001 g.) These are delicate instruments, subject
More informationSOLUBILITY OF A SOLID IN WATER
1516L Experiment 1 SOLUBILITY OF A SOLID IN WATER Objectives In this experiment you will determine the solubility of potassium nitrate (KNO 3 ) in water at various temperatures. You will prepare a plot
More informationChemistry 261 Laboratory Experiment 6: Reduced Pressure Distillation of a Mixture of High Boiling Alcohols
Chemistry 261 Laboratory Experiment 6: Reduced Pressure Distillation of a Mixture of High Boiling Alcohols Reading from Zubrick, 10 th edition Jointware, pages 30-40 Sources of Heat, pages 131-139 Clamping,
More informationThe Determination of the Value for Molar Volume
Objective The Determination of the Value for Molar Volume Using a chemical reaction that produces a gas, measure the appropriate values to allow a determination of the value for molar volume. Brief Overview
More informationUNIT 10 - GASES. Notes & Worksheets - Honors
Ideal Gas Equation 1 WKSHT 1.) What is the pressure exerted by 2.0 moles of an ideal gas when it occupies a volume of 12.0 L at 373 K? 2.) A flashbulb of volume 2.6 cm 3 contains O 2 gas at a pressure
More informationVapor Pressure of Liquids
Vapor Pressure of Liquids Calculator 10 In this experiment, you will investigate the relationship between the vapor pressure of a liquid and its temperature. When a liquid is added to the Erlenmeyer flask
More informationEvaluation copy. Vapor Pressure of Liquids. computer OBJECTIVES MATERIALS
Vapor Pressure of Liquids Computer 10 In this experiment, you will investigate the relationship between the vapor pressure of a liquid and its temperature. When a liquid is added to the Erlenmeyer flask
More informationLab 1. Instrumentation Familiarity: Using Micropipetters and Serological Pipettes
Instrumentation Familiarity: Using Micropipetters and Serological Pipettes Introduction: In molecular biology we sometimes need to measure volumes as small as one millionth of a liter (a liter is about
More informationCH2250: Techniques in Laboratory Chemistry. Outline Measuring Mass Measuring Volume Significant figures. Mass Measurement
CH2250: Techniques in Laboratory Chemistry Outline Measuring Mass Measuring Volume Significant figures Mass Measurement Mass Measurement Measure mass not weight Mass is measured with a balance (a scale
More informationMETHOD OF TEST FOR THEORETICAL MAXIMUM RELATIVE DENSITY OF BITUMINOUS PAVING MIXTURES LS-264 R27 ASTM D2041/D2041M
3. APPARATUS 3.1 BEAKERS OR VESSELS: Stainless steel vessel, 4000 ml capacity, no spout... 3.2 BALANCE: 4000 g capacity with an accuracy of ± 0.1 g... 3.3 RIFFLE SPLITTER: For splitting hot mix samples.
More informationExperiment 8 GAS LAWS
Experiment 8 GAS LAWS FV 6/25/2017 MATERIALS: Amontons Law apparatus, Boyle s Law apparatus, Avogadro s Corollary apparatus, four beakers (2 L), warm-water bath, ice, barometer, digital thermometer, air
More informationName Hour. The Behavior of Gases. Practice B
Name Hour The Behavior of Gases Practice B B 1 Objective 1: Apply Boyle s Law, Charles s Law, and Gay-Lussac s Law to solve problems involving pressure and volume and temperature. 1. A high-altitude balloon
More informationTHE DECOMPOSITION OF POTASSIUM CHLORATE This lab is derived almost entirely from a lab used at the United States Naval Academy
THE DECOMPOSITION OF POTASSIUM CHLORATE This lab is derived almost entirely from a lab used at the United States Naval Academy PURPOSE: The purpose of this experiment is to study the decomposition of potassium
More informationMeasuring Carbon Dioxide in Breath
Measuring Carbon Dioxide in Breath OBJECTIVES 1. Measure the partial pressure of carbon dioxide in your breath 2. Estimate the volume of air you exhale per day 3. Estimate the volume and mass of CO2 you
More informationVapor Pressure of Liquids
Vapor Pressure of Liquids Experiment 10 In this experiment, you will investigate the relationship between the vapor pressure of a liquid and its temperature. When a liquid is added to the Erlenmeyer flask
More informationDetermination of the Percentage Oxygen in Air
CHEM 121L General Chemistry Laboratory Revision 1.2 Determination of the Percentage Oxygen in Air In this laboratory exercise we will determine the percentage by volume of Oxygen in Air. We will do this
More informationGeneral Safety Rules
General Safety Rules 1. The goggles provided by the university are to be properly worn at all times in the lab. 2. You are to be properly dressed in the lab. a. Close-toed shoes. b. At least a short sleeve
More informationof Carbon Dioxide (CO 2
CHAPTER 10 Phase Changes of Carbon Dioxide (CO 2 ) Objectives This experiment is an introduction to phase changes of pure substances and an introduction to some simple microtechniques for doing experiments
More informationPre-Lab 6: Gas Law ~ 70 ~
Name: Pre-Lab 6: Gas Law Section: Answer the following questions after reading the background information at the beginning of the lab. This should be completed before coming to lab. 1. Convert the following:
More informationExperiment 1 Basic Laboratory Operations
Experiment 1 Basic Laboratory Operations INTRODUCTION LECTURE OUTLINE This is the first experiment that most students perform in the laboratory. Oftentimes, the stone is cast in this first laboratory session.
More informationRead ENTIRE lab up to Disposal Section. MAKE NOTES!!! **For Procedures, Highlight equipment used and circle quantities measured out.
Lab Ch 2 Mass, Volume, & Density Lab Partners: READ Prelab!!! Read ENTIRE lab up to Disposal Section. MAKE NOTES!!! **For Procedures, Highlight equipment used and circle quantities measured out. Density
More informationLABORATORY SAFETY EQUIPMENT Final Grade: /45
LABORATORY SAFETY EQUIPMENT Final Grade: /45 CH.lbSg - Identify, locate, and know how to use laboratory safety equipment including laboratory aprons, lab safety goggles, lab gloves, fire extinguishers,
More informationCalibration of Volumetric Glassware
Calibration of Volumetric Glassware Introduction This set of laboratory experiments is designed to introduce you to some of the apparatus and operations you will be using during the remainder of this course,
More informationExample: 25 C = ( ) K = 298 K. Pressure Symbol: p Units: force per area 1Pa (Pascal) = 1 N/m 2
Chapter 6: Gases 6.1 Measurements on Gases MH5, Chapter 5.1 Let s look at a certain amount of gas, i.e. trapped inside a balloon. To completely describe the state of this gas one has to specify the following
More informationLab Session #4 AN Physical Properties
Lab Session #4 AN Physical Properties The main goal of this laboratory session is to provide a practical experience in the determination of the physical properties for AN and ANFO. The students will determine
More informationBASIC LAB SKILLS: EIGHING BALANCE AND BUNSEN
Experiment 1 Name: 74 W BASIC LAB SKILLS: EIGHING BALANCE AND BUNSEN 5 B URNER This lab is designed to familiarize students with various pieces of common lab equipment. The following are general procedures
More informationChemistry 1B Chapter 10 Worksheet - Daley. Name
Name 1) The National Weather Service routinely supplies atmospheric pressure data to help pilots set their altimeters. The units the NWS uses for atmospheric pressure are inches of mercury. A barometric
More information1. Determining Solution Concentration
In this exercise you will determine the concentration of salt solutions by measuring samples with known concentration and making a calibration curve. You will review units of concentration, and how to
More informationTo derive from experiment the relationships between Pressure (P), Volume (V), Temperature (T), and Water Solubility of gases.
PROPERTIES OF GASES: PRESSURE, VOLUME, TEMPERATURE, & SOLUBILITY RELATIONSHIPS PURPOSE: To derive from experiment the relationships between Pressure (P), Volume (V), Temperature (T), and Water Solubility
More informationDEMONSTRATION 2.1 PROPERTIES OF CO 2. Chapter 2: Gases
DEMONSTRATION 2.1 Chapter 2: Gases PROPERTIES OF CO 2 This demonstration has two aims: firstly, to show that carbon dioxide gas is denser than air; secondly, to show that carbon dioxide will not support
More informationHeat Engine. Reading: Appropriate sections for first, second law of thermodynamics, and PV diagrams.
Heat Engine Equipment: Capstone, 2 large glass beakers (one for ice water, the other for boiling water), temperature sensor, pressure sensor, rotary motion sensor, meter stick, calipers, set of weights,
More informationExploring the Properties of Gases
Exploring the Properties of Gases LabQuest 30 The purpose of this investigation is to conduct a series of experiments, each of which illustrates a different gas law. You will be given a list of equipment
More informationMeasurements. Metric System
Measurements Measurements are basic to any scientific pursuit. A measurement has both a magnitude (numeric value) and a unit. Metric units are used in the sciences. Metric System In science, the metric
More informationVapor Pressure of Liquids
Vapor Pressure of Liquids In this experiment, you will investigate the relationship between the vapor pressure of a liquid and its temperature. When a liquid is added to the Erlenmeyer flask shown in Figure
More informationMultiple Choice (40%)
AP Chemistry Test (Chapter 5) Please do not write on this test thank you! Multiple Choice (40%) 1) A sealed rigid container is filled with three ideal gases: A, B and C. The partial pressure of each gas
More informationTo compare one gas to another, it is convenient to define a set of conditions: Standard Temperature and Pressure
Standard Molar Volume To compare one gas to another, it is convenient to define a set of conditions: Standard Temperature and Pressure At STP, one mole of any gas has a volume of: 22.4 L = (This is a cube
More informationGases NO CALCULATORS MAY BE USED FOR THESE QUESTIONS
NO CALCULATORS MAY BE USED FOR THESE QUESTIONS Questions 1-3 refer to the following gases at 0 C and 1 atm. (A) Ar (B) NO 2 (C) Xe (D) H 2 (E) N 2 1. Has an average atomic or molecular speed closest to
More informationCHEM 321 Experiment 1
CHEM 321 Experiment 1 Basics Review and Calibration of Volumetric Glassware There are three types of containers used in lab to contain or deliver liquids: volumetric, ordinary and disposable glassware.
More informationEXERCISES Gas Laws. Chooise the correct answer
Alícia Rosa EXERCISES Gas Laws Chooise the correct answer 1 Atmospheric pressure at an altitude of 10 km is 2.1x10 2 mm. What is the pressure in atmospheres at 10 km? 1.6x10 5 atm 3.6 atm 0.28 atm 2 Atmospheric
More informationAdaptations of Desert Plants
Adaptations of Desert Plants Topic The shape and surface area of a leaf are related to its ability to gain and release water. Introduction Deserts are biomes that present great difficulties to their inhabitants.
More informationOUTREACH SPRING QUARTER 2002
OUTREACH SPRING QUARTER 2002 Tuesday April 9, PSBN 1622 Workshop I: 9 to 10:30 Workshop II: 10:30 to 12 Saturday May 4, PSBN 1652 Workshop I: 10:30 to 12 Workshop II: 1:30 to 3 Tuesday May 7, PSBN 1652
More informationHCMTCB ASPHALT CERTIFICATION KEY ELEMENTS LIST
HCMTCB ASPHALT CERTIFICATION KEY ELEMENTS LIST Release Date: November 6, 2014 AASHTO T-168 Sampling of Bituminous Material Funnel Device 1 Select units to be sampled by what method? 2 Relative size and
More informationPart A: 20 minutes plus 30 minutes setting time Part B: day 1, 20 minutes; then 5 minutes each day for about 5 days
The Bugs On Our Skin Topic Study of the microorganisms found on skin Introduction We spend considerable time cleaning ourselves, but we cannot rid ourselves of all the microbes on our bodies. Forensic
More information