Electrolysis S .pdf - 1. The electrolysis of a molten...

1. The electrolysis of a molten binary salt produces its constituent elements.
a. Define the term electrolysis : [2]
b. The electrolysis of molten iron(III) chloride produces elemental iron and chlorine.
i. Write a balanced equation, including state symbols, for the overall process: [3]
ii. Write the half-equation for the anode: [3]
iii. Write the half-equation for the cathode: [3]
c. Calculate the volume of chlorine gas that can be produced by the electrolysis of molten
lead(II) chloride for 300 seconds at a current of 0.1A. The faraday constant is 96,000
coulombs per mole. [4]
2. The electrolysis of a dilute sulphuric acid solution was originally used to determine the chemical
formula of water.
a. What ions are present in the solution due to the sulphuric acid? [2]
b. What ions are present in the solution due to the water?