-
To set up for this lab experiment, wear the appropriate personal protective equipment, including a lab coat, chemical splash goggles, and gloves
-
Prepare 0.1 M oxalic acid dihydrate. Each group will need 50 mL. For 500 mL of solution, weigh 6.304 g of oxalic acid, and transfer it to an Erlenmeyer flask. Note: Oxalic acid is corrosive, so use caution while handling.
-
Measure 500 mL of deionized water, and pour it into the flask. Add a stir bar and set the flask onto a stir plate. Turn on the stir setting and allow the solution to mix until it is homogeneous.
-
Obtain a polyethylene bottle with a cap and label it. Use a powder funnel to transfer the solution to the bottle, cap it, and store it in the instructor's hood until the lab.
-
Prepare a 0.1 M potassium nitrate solution, which will be used to soak the strings for the salt bridge. To make 250 mL of solution, weigh 2.53 g of potassium nitrate and transfer it to a flask.
-
Add 250 mL of deionized water to the flask and stir the solution until it appears homogeneous.
-
Transfer the solution into a labeled glass bottle and store it in the instructor's hood until the lab class.
-
Prepare a 0.05 M zinc sulfate solution, which will be used as an unknown solution in the experiment. Each group will need 8 mL of solution, so calculate how much you will need to make for your class.
-
To make 250 mL of solution, weigh 3.6 g of zinc sulfate and transfer it to an Erlenmeyer flask.
-
Add 250 mL of deionized water to the flask and set the solution on the stir plate to mix.
-
Once the solution appears homogeneous, divide it into two brown glass bottles.
-
Label one of the bottles as ‘unknown number 1’, and the other as ‘unknown number 3’. Store the bottles in the instructor's hood until the lab.
-
Prepare 0.22 M silver nitrate, which will also be used as an unknown solution in the experiment. Each group will need 8 mL. To prepare 250 mL of solution, weigh 9.34 g of silver nitrate, and transfer it to the flask.
-
Add 250 mL of deionized water and mix the solution until it is homogeneous.
-
Then, transfer the solution to two brown glass bottles. Label them ‘unknown number 2’ and ‘unknown number 4’. Store the bottles with the other prepared solutions in the instructor's hood.