JAMB - Physics (1983 - No. 20)
The electrochemical equivalent of a metal is 0.126 x 10-6 kgC-1. The mass of the metal that a current of 5A will deposit from a suitable bath in 1 hour is
0.0378 x 10 -3kg
0.227 x 10 -3kg
0.378 x 10 -3kg
0.595 x 10 -3kg
2.268 x 10 -3kg
설명
m = Itz
= 5 x 3600 x 0.126 x 10-6
= 2.268 x 10-3kg
= 5 x 3600 x 0.126 x 10-6
= 2.268 x 10-3kg