2 quick electrochem gr 12 questions?

Question

Can someone explain step by step how to do these 2 questions? Thanks.



If we assume standard conditions, the minimum potential difference required to electrolyze a solution of nickel II sulfate is?

ans: 1.49V

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In the plating of nickel from a nickel II ion solution the mass of nickel obtained from the transfer of 0.250 mol of electrons is?

ans: 7.34g

Answer 1

Ni2+ + 2e- ----> Ni. What voltage is necessary to reverse this? The standard electrode potential, as a minimum.

One mole of Ni requires 2 moles of electrons. A quarter of a mole of electrons will therefore give an eighth of a mole of Ni.