When a current I was passed through an electrolyte solution for 40 minutes, a mass X g of a univalent metal was deposited at the cathode. What mass of the metal will be deposited when a current 2I is passed through the solution for 10 minutes?
A. X/4 g B. X/2 g C. 2X g D. 4X g
Correct Answer: B
Explanation
From M = zit Where M = to the mass of the metal liberated z = Is the electrochemical equivalent ∴ X g = 1 * 1 * 40 * 60 X g = 2400 I Let Y represent the new mass Y = 1*2I * 10 * 60 Y = 1200 I Y/(X g) = 1200 I/2400 I Y = X/2 g
