passwella.
Menu

JAMB Chemistry 2014 Question 24

Question 24

Electrolysis

Calculate the quantity of electricity in coulombs required to liberate 10 g of copper from a copper compound. [Cu = 64, F = 96500 C mol-1]

  1. A.32395.5
  2. B.30156.3
  3. C.60784.5
  4. D.15196.5
Show the answer and explanation

Answer: B (30156.3)

Explanation

Cu2+ + 2e− → Cu: 64 g needs 2 × 96500 C, so 10 g needs (10 × 2 × 96500)/64 = 30156.3 C.