CHEMISTRY

JAMB 2020 - Question 29

Chemistry 2020 JAMB Past Questions - Question 29: when a current I was passed through an electrolyte solution for 40 minutes, a mass X g of a univallent metal was deposited at the cathode. what mass of the metal will be deposited when a current 21 is passed through the solution for 10 minutes?

Choose the most appropriate option for the gap .
when a current I was passed through an electrolyte solution for 40 minutes, a mass X g of a univallent metal was deposited at the cathode. what mass of the metal will be deposited when a current 21 is passed through the solution for 10 minutes?
A:
B:
C:
D:
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Correct Answer

B

Explanation

from M = zitwhere M = to the mass of the metal liberated Z = is the electrochemical eqyivalent i.e Xg = 1 x 1 x 40 x 60 Xg = 2400 1 let Y represent the new mass Y = 1200l Y/Xg = 1200 l/2400 l Y = x/2