The same current is passed for the same time through solutions of AgNO3 and CuSO4 connected in series. How much silver will be deposited if 1.0 g of copper is produced? [Cu = 63.5, S = 32, O = 16, Ag = 108, N = 14]
A. 1.7 g B. 3.4 g C. 6. 8 g D. 13. 6 g
Correct Answer: B
Explanation
From Faraday;s second law of electrolysis \(\frac{\text{Mass of silver deposited}}{\text{Mass of copper deposited}}\) = \(\frac{\text{Equivalent mass of silver}}{\text{Equivalent mass of copper}}\) \(\frac{\text{Mass of silver deposited}}{1.0g}\) = \(\frac{108}{63.5}\) = 31.75g Copper is devalent = Cu2+ Mass of silver deposited = \(\frac{108g}{31.75g}\) = 3.30g
