General Chemistry 2 Labs using Argument-Driven Inquiry

Introduction

Argument-Driven Inquiry
- Argument-Driven Inquiry
  
  This lab course is taught using a new and innovative instructional model called Argument-Driven Inquiry (ADI)...
- An Introduction to Scientific Argumentation
  
  Over the course of human history, people have developed many interconnected and validated ideas about the natural world...
- Interactive Poster Session
  
  Once your group has completed your work, prepare a whiteboard (Figure 1) that you can use to share and justify your ideas...
- Lab Report Scoring Rubric
  
  Lab Report Scoring Rubric printable form
- Lab Report Review and Score
  
  Lab Report Review and Score printable form
Lab Safety and Practices
- Lab Safety
  
  The lab instructor will provide a statement to be signed by the student confirming that the following rules and regulations have been read by the student and summarized by the lab instructor...
- Good Lab Practices
  
  Much of this course involves obtaining accurate data...
- Measurements
  
  Chemistry is an experimental science that requires the use of a standardized system of measurements...
- Preparing Graphs
  
  Graphs are often used to organize data so that relationships between numbers can be visualized...
Laboratory Equipment
- Laboratory Equipment and Glassware
  
  Goggles, Plastic/Glass Ruber Policemen, Tongs, Test Tube Holder, Erlenmeyer Flasks, Beakers, Graduated Cylinders...
- Vernier Calipers
  
  The vernier consists of a main scale engraved on a fixed ruler and an auxiliary vernier scale engraved on a movable jaw...
- Analytical Balance
  
  Analytical balances are used for very accurate, quantitative measurements of mass to the nearest 0.001 g...
- Volumetric Glassware
  
  In quantitative chemistry, it is often necessary to make volume measurements with an error on the order of 0.1%, one part per thousand...
- Bunsen Burner
  
  A bunsen burner is one of the primary means of heating in the laboratory...
- Centrifuge
  
  Centrifugation (high-speed rotation) will be used to rapidly settle precipitates in solution...
Instructional Videos
- Instructional Videos
  
  Chemistry Lab Safety, Argument-Driven Inquiry, Handling Liquids, Handling Solids, Bunsen Burner, Spec 20
- Additional Instructional Videos
  
  Cleaning & Conditioning a Buret, Titration, Cleaning a Buret, Using an Analytical Balance, Using a Volumetric Flask, Pipeting Techniques
Resources
- Periodic Table
  
  Periodic Chart of the Elements
- Statistical Analysis of Data Collected
  
  When performing laboratory experiments, a certain variation in results will always occur regardless of the care taken in measuring...

Lab Investigations

Printable Worksheets and Pre-Laboratory Exercises
- Pre-Laboratory Exercises for Investigation 1
  
  Familiarize yourself with the LabPro data collection system...
- Pre-Laboratory Exercises for Investigation 2
  
  Your group must complete a MINIMUM of FOUR TRIALS and three trials must agree WITHIN −1%...
- Pre-Laboratory Exercises for Investigation 3
  
  In preparation for the lab next week, prepare 1.0 M solutions of each of the unknown salts M₁ through M₃...
- Pre-Laboratory Exercises for Investigation 4
  
  Because crystal violet is a colored species, a device that measures light absorbance may be used to determine concentration...
- Pre-Laboratory Exercises for Investigation 5
  
  What factors affect the equilibrium system...
- Worksheet for Investigation 5
  
  Beer's Law Calibration Curve...
- Pre-Laboratory Exercises for Investigation 6
  
  You will be using pH electrodes connected to the Vernier LabPro system...
Lab Investigation 1 - Why Do Liquids Evaporate at Different Rates?
- Guiding Question
  
  Why do liquids evaporate at different rates?
- Introduction
  
  Have you ever had a sunburn or high fever? If so, you may have used rubbing alcohol to help cool your skin...
- Goals
  
  As you complete this investigation you will...
- Materials Available for Use
  
  Distilled water, H₂O, Acetone, C₃H₆O, Methanol, CH₄O, Pentane, C₅H₁₂...
- Safety Precautions
  
  Wear goggles at all times.
- Getting Started
  
  Using models of CH₄, CH₂O and H₂O, consider the questions below...
- Procedure
  
  Set up the data collection program to collect data for 300 seconds...
- Report
  
  Once you have completed your research, you will need to prepare an investigation report that consists of three sections...
- Pre-Laboratory Exercises for Investigation 1
  
  Use the Molecular Model kit to make model of each of the compounds that will be studied in Investigation 1 and answer the questions that compare/contrast structures...
- Old Pre-Laboratory Exercises for Investigation 1
  
  Familiarize yourself with the LabPro data collection system...
Lab Investigation 2 - How Much Acetic Acid is in Vinegar?
- Guiding Question
  
  How much acetic acid is in vinegar?
- Introduction
  
  Many laboratories analyze consumer products to determine accuracy in the labeling of the product...
- Goals
  
  As you complete this investigation you will...
- Materials Available for Use
  
  Vinegar, NaOH(aq) solution, KHP-potassium hydrogen phthalate...
- Safety Precautions
  
  NaOH is corrosive. It can attack the skin and cause permanent damage to the eyes...
- Getting Started
  
  Your first task is to standardize the NaOH solution using solid KHP (KC₈H₅O₄, 204.22 g/mol)...
- Procedure
  
  Check the buret by rinsing down the sides with distilled water bottle to check if water "sheets" down inside of the buret...
- Interactive Poster Session
  
  Once your group has completed your work, prepare a whiteboard that you can use to share and justify your ideas...
- Report
  
  Once you have completed your research, you will need to prepare an investigation report that consists of three sections...
- Pre-Laboratory Exercises for Investigation 2
  
  Your group must complete a MINIMUM of FOUR TRIALS and three trials must agree WITHIN −1%...
Lab Investigation 3 - What are the Unknown Metals? Which Metals Make the Best Battery?
- Guiding Question
  
  Which two metals with their corresponding electrolyte solutions will make the highest voltage battery?
- Introduction
  
  Oxidation-reduction reactions involve a transfer of electrons...
- Goals
  
  As you complete this investigation you will...
- Materials Available for Use
  
  Copper (Cu), 1.0 M CuSO₄(aq), 4 metals identified only as M₁ through M₄...
- Safety Precautions
  
  Wear goggles at all times...
- Getting Started
  
  In this laboratory you will construct and evaluate several voltaic cells...
- Procedure
  
  Be sure to clean the surface of the metals with steel wool before use...
- Interactive Poster Session
  
  Once your group has completed your work, prepare a whiteboard that you can use to share and justify your ideas...
- Report
  
  Once you have completed your research, you will need to prepare an investigation report that consists of three sections...
- Selected Standard Reduction Potentials @ 25°C
  
  Selected Standard Reduction Potentials @ 25°C
- Pre-Laboratory Exercises for Investigation 3
  
  In preparation for the lab next week, prepare 1.0 M solutions of each of the unknown salts M₁ through M₃...
Lab Investigation 4 - How Fast Does the Crystal Violet Decolorize?
- Guiding Question
  
  What is the rate law for decolorization of crystal violet?
- Introduction
  
  Crystal violet is used to dye paper and as a component of navy blue and black inks for printing, ballpoint pens, and ink jet printers...
- Fundamentals of Chemical Kinetics
  
  The rate of a reaction is expected to depend on the concentrations of reactants and possibly other substances...
- Goals
  
  As you complete this investigation you will...
- Materials Available for Use
  
  1.0 x× 10⁻⁴ M crystal violet solution, 0.10 M NaOH(aq), 1.0 M HCl(aq) (for cleaning glassware), Spot plate...
- Safety Precautions
  
  Wear goggles at all times...
- Getting Started
  
  Your first task is to prepare a Beer's law calibration curve for absorbance versus concentration of crystal violet, [CV⁺]...
- Procedure
  
  You need to make sure that your decolorization reaction occurs within the linear range of your calibration curve and that you have a large excess of hydroxide ion, OH⁻...
- Interactive Poster Session
  
  Once your group has completed your work, prepare a whiteboard that you can use to share and justify your ideas...
- Report
  
  Once you have completed your research, you will need to prepare an investigation report that consists of three sections...
- Pre-Laboratory Exercises for Investigation 4
  
  Because crystal violet is a colored species, a device that measures light absorbance may be used to determine concentration...
Lab Investigation 5 - What Is the Formation Constant for FeSCN²⁺?
- Guiding Question
  
  What is the formation constant for the FeSCN²⁺ system?
- Introduction
  
  A typical chemical equation has the following form...
- Goals
  
  As you complete this investigation you will...
- Materials Available for Use
  
  0.100 M Fe(NO₃)₃ in 0.2 M HNO₃, 5.00 × 10⁻⁴ M NaSCN in 0.2 M HNO₃, 0.00200 M Fe(NO₃)₃ in 0.20 M HNO₃...
- Safety Precautions
  
  Wear goggles at all times...
- Waste Disposal
  
  All of the solutions prepared in this experiment, as well as excess NaSCN solution, should be discarded in the waste container...
- Procedure
  
  Because the FeSCN²⁺ complex ion is a colored species, a device that measures light absorbance can generate data for a Beer's law calibration curve...
- Interactive Poster Session
  
  Once your group has completed your work, prepare a whiteboard that you can use to share and justify your ideas...
- Report
  
  Once you have completed your research, you will need to prepare an investigation report that consists of three sections...
- Sample Data Table
  
  mL 0.0020 M Fe(NO₃)₃...
- Pre-Laboratory Exercises for Investigation 5
  
  What factors affect the equilibrium system?
- Worksheet for Investigation 5
  
  Beer's Law Calibration Curve...
Lab Investigation 6 - How Well Can a Buffer Resist pH Change?
- Guiding Question
  
  How do you prepare a proper buffer?
- Introduction
  
  In dilute aqueous solutions, weak acids are slightly dissociated...
- Goals
  
  As you complete this investigation you will...
- Materials Available for Use
  
  Volumetric flasks, Graduated cylinders, Pipettor and tips, Beakers, Erlenmeyer flasks, Buret, Funnel...
- Safety Precautions
  
  Acetic acid, HCl, and NaOH are corrosive...
- Waste Disposal
  
  All solutions can be flushed down the sink with water.
- Getting Started
  
  What reagents will you use to obtain desired pH...
- Procedure
  
  You need to prepare 100 mL of the buffer solution using the appropriate volume of 1.0 M acetic acid and the appropriate mass of sodium acetate...
- Interactive Poster Session
  
  Once your group has completed your work, prepare a whiteboard that you can use to share and justify your ideas...
- Report
  
  Once you have completed your research, you will need to prepare an investigation report that consists of three sections...
- Pre-Laboratory Exercises for Investigation 6
  
  You will be using pH electrodes connected to the Vernier LabPro system...