Nickel can be plated from aqueous solution according to the following half reaction.How long would it take (in minutes) to plate 29.6 g of nickel at 4.7 A?
Ni²⁺(aq) + 2 e⁻ → Ni(s)

Question

Nickel can be plated from aqueous solution according to the following half reaction.How long would it take (in minutes)to plate 29.6 g of nickel at 4.7 A? Ni²⁺(aq)+ 2 e⁻ → Ni(s)

Quizplus · Accepted Answer

First, we need to convert the mass of nickel to moles:

29.6 g Ni / 58.69 g/mol = 0.504 mol Ni

Since 2 electrons are needed to plate 1 mole of Ni, we need to calculate the amount of charge needed:

0.504 mol Ni x 2 electrons/mol x 96,485 C/mol = 97,900 C

Now we can use the equation Q = It, where Q is the charge needed, I is the current (amps), and t is the time (seconds):

97,900 C = 4.7 A x t (in seconds)

Solving for t:

t = 20,807 seconds

Converting to minutes:

20,807 seconds x (1 min / 60 seconds) = 347.8 min = 3.5 x 10^12 min

Therefore, the best choice is C.

Nickel Can Be Plated from Aqueous Solution According to the Following