Electrochemistry Pre-lab Exercise
Name_____________________________ TA______________________________________
Date __________________________ Lab Section_____________________
This assignment must be completed individually and turned in to your TA at the beginning of lab. You will not be allowed to begin the lab until you have completed this assignment.
1. Write a balanced chemical equation for the electrolysis of molten potassium iodide (KI).
2. An electric current of 0.211 mA passes through an electrolytic cell for 2.00 min. How many moles of electrons have passed through the cell?
3. A voltage drop of 3.412 V is measured across a resistance of 10.51 ohms. How much current is flowing through the resistor?
4. Why is the anode not weighed before electrolysis begins?