A solution of Ni `(NO_3)_2` is electrolysed between platinum electrodes using a current of 5 amperes for 20 minutes. What mass of Ni is deposited at the cathode.

Explanation

Quantity of electricity passed =5(A)` times 20 times 60 (S)`
=6000C
Electrode reaction is
`Ni^(2+)+2e^(-) to Ni`
`2 times 96,500C` of electricity product Ni
`=(58.7 times 6000)/(2 times 96500)`
=1.825 g