QUESTION 15 1 points Save Answer When an aqueous solution of lithium iodide unde

Question

QUESTION 15 1 points Save Answer When an aqueous solution of lithium iodide undergoes electrolysis which species in the solution undergoes oxidation and which undergoes reduction G Species oxidized Species Reduced QUESTION 16 1 points When water is subject to electrolysis, whatgasi produced at the anode? O H202 OH20 QUESTION 17 1 points What is the minimum voltage required for the electrolysis of amelt of nickall Chioride? QUESTION 18 1 points Save Answer How many minutes will take to electroplate0334 grams of copper metal. CueN from a solution containing cu2 with a current of 317 amps? 1 A F 96,500C/mole electron

Explanation / Answer

ANSWER

Dear candidate you have asked four questions as per guidelines one question one time. Here we solve 15, 16 and 17. Send the remainin separately.

15. (A) Species that may get oxidised = I-, H2O

Since I- has higher oxidation poential (-0.54V) than water (-0.82V) . Hence I- will get oxidised.

(B) The species that may get reduced = Li+ and H2O. Since reduction potential of Li+ is lower (-0.3V) is lower than H2O hence H2O will undergo reduction.

16. O2 is liberated at anode.

17. Ni2+ + 2e- ------ > Ni(s) Eo = -0.72V

2Cl- ----->Cl2 + 2e- (g) Eo = -1.36V

Ecell = Ered + Eoxid = -0.72 + (-1.36) = - 2.08V

Since Ecell is negative the process is non-spontaneous. A voltage > tha + 2.08 V is required for the electrolysis of NiCl2.

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