Question

The number of Faradays which will be required to reduce 4 gram equivalents of Cu²⁺ to Cu metal is ______.

Options

• 1

• 2

• 3

• 4

Answer 1

The number of Faradays which will be required to reduce 4 gram equivalents of Cu²⁺ to Cu metal is 4.

Explanation:

The reduction of one equivalent of Cu²⁺ requires 1 Faraday of electricity because Cu²⁺ gains 2 electrons to become Cu metal, hence 1 equivalent corresponds to 1 mole of electrons. Given 4 gram equivalents of Cu²⁺, the number of Faradays required is 4 × 1 = 4 Faradays.

So, to reduce 4 gram equivalents of Cu²⁺ to copper metal, 4 Faradays of electric charge are needed.