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Question

Which of the following statements is true concerning the electrolysis of a 1.0 M aqueous solution of NaI?

Reduction Half-ReactionEº(V)
Na+(aq) + e- Na(s)-2.71
2H2O(l) + 2e- H2(g) + 2OH-(aq)-0.83
2H+(aq) + 2e- H2(g)0.00
I2(s) + 2e- 2I-(aq)0.54
O2(g) + 4H+(aq) + 4e- 2H2O(l)1.23

A) The solution becomes more basic.
B) Sodium is deposited at the cathode.
C) Iodine is formed at the cathode.
D) Oxygen is evolved at the anode.
E) Hydrogen is evolved at the anode.

Answer

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