Laboratory 6
Solutions

Instructions
Now you are ready to begin a laboratory assignment. Remember to keep a careful and complete record of your laboratory activities in your Lab Notebook.
Before beginning the activity, be sure to:

• Read the entire laboratory assignment.

• Complete the prelab quiz.

Questions are provided in the analysis section of the laboratory activity. You are encouraged to discuss these questions with your fellow students in the Discussion Area for this laboratory.

Discuss This Lab
You are encouraged to discuss these questions and any other you may have about this laboratory with your classmates.

Critique this laboratory
Take a moment to help us improve our course. When you have completed this assignment, please let your instructor know of any problems you had with the experiment and any errors you discovered in the procedure. Also, comment on what worked well for you. Thanks for your help.

Laboratory 6 • Solutions

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Introduction
At this point in your lecture class you may have discussed the concept of the mole and the quantitative aspects of chemistry. In this exercise you will be making most of the solutions that you need for the other laboratory experiments. It is critical that this lab be performed accurately.
In this exercise we will discuss the concept of the mole while giving much prescribed instructions on how to make each solution. One of the solutions you will be making, Iron (III) Chloride, will take several days to make a solution of rusty water with sufficient mass of rust (Fe2O3) to make the Iron (III) Chloride solution. Don’t worry you won’t need to watch it for several days, but plan to start this lab early enough to complete within the allotted time. In addition, start this experiment first and let it run while you make the other solutions.
All of the chemicals used in this exercise are available from your local hardware and grocery stores. But, don’t let that fool you into thinking these reagents should not be respected as chemical reagents. You must follow proper laboratory procedure at all times. • All reagents bottles must be labeled properly • All reagents must have a cap and be sealed when not in use • All reagents must be stored in a proper location

• Acids stored with acids

• Bases stored with bases

• AND, you must always wear your safety glasses

Purpose
The purpose of this lab is to learn proper handling of chemical reagents, proper storage of chemical reagents, and their preparation.

Equipment list from kit

1. Balance

2. 100 mL Graduated Cylinder

3. 250 mL Beaker

4. 600 mL Beaker

5. 1.000 L Volumetric Flask

6. Power Supply

7. Alligator clips

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Laboratory 6 • Solutions

Supply list 1. Muriatic Acid. Caution: KEEP AWAY FROM LYE!

• Chemical name: Concentrated HCl

• Vendor: hardware store.

2. Baking Soda

• Chemical name: Solid NaHCO3

• Vendor: grocery store.

3. 100% Lye. Caution: KEEP AWAY
FROM MURIATIC ACID!

• Chemical name: Solid NaOH

• Vendor: hardware store.

4. Rebar 18 inches 5. Hydrogen Peroxide

• Chemical name: 3% H2O2 (3L)

• Vendor: Drug Store

6. Latex gloves 7. 2 Sheets of 8.5”x11” label paper 8. Eight clean half-gallon plastic bottles with screw tops, such as milk bottles with recycle code of 2 9. Plastic spoons 10. 2 Liter Soda Bottle 11. One 8 inch piece of Copper grounding wire

Safety considerations • Safety glasses should be worn. • Latex Gloves should be worn. • Any broken or chipped glassware should be replaced. • Review all MSDS associated with this lab.

Tasks 1. Make 1.00 M HCl solution 2. Make 0.500 M HCl solution 3. Make 0.100 M HCl solution 4. Make 3 M NaOH solution 5. Make 1 M NaOH solution 6. Make 0.1 M NaOH solution 7.