Electrolysis of Molten Salts Part A Electrolytic cells use electricity to cause

Question

Electrolysis of Molten Salts Part A Electrolytic cells use electricity to cause a nonspontaneous redox reaction to occur. An electrolytic cell is constructed using the following components: What substance is produced at the cathode during the electrolysis of molten calcium bromide, CaBr2? Assume standard conditions. Express your answer as a chemical formula. a power source, such as a battery the substance that will undergo electrolysis, and two inert electrodes (usually platinum), which serve as the electrical connection between the power source and the substance undergoing electrolysis · Submit Hints My Answers Give Up Review Part When electricity is applied to a molten binary salt during electrolysis, the cation will be reduced and the anion will be oxidized. If more than one cation is present, only the one with highest reduction potential will be reduced. Similarly, if more than one anion is present, only the one with the highest oxidation potential will be oxidized. Part B What substance is produced at the anode during the electrolysis of molten calcium bromide, CaBr2? Assume standard conditions. Express your answer as a chemical formula. Submit Hints My Answers Give Up Review Part Part C What substance is produced at the cathode during the electrolysis of a mixture of molten calcium bromide, CaBr2 (1), and molten magnesium iodide, Mgl2 ()? Assume standard conditions. Express your answer as a chemical formula.

Explanation / Answer

Part A:

Negative electrode (cathode)
Ca+2 (aq) + 2e- ---> Ca (s)

Ca (s) is produced

Part B:

Positive electrode (anode)
2 Br -  (aq) ---> Br2 (l) + 2e-

Br2 is produced

Part C:

Mg+2 (aq) + 2e-----> Mg (s)

Mg (s) is produced

Part D:

2 I - ----> I2 (s) + 2e-

I2 (s) is produced.

Hope this helps!

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