Question

Silver is monovalent and has atomic mass of 108.Copper is divalent and has atomic mass of 63.6. The same electric current is passed for the same length of time through a silver coulo meter and a copper coulo meter. If 27.0 g of silver deposited, then corresponding amount of copper deposited is

• A. 63.60 g
• B. 31.80 g
• C. 15.90
• D. 7.95 g

Answer 1

Answer: (D)

$\frac{W_{Ag}}{E_{Ag}}=\frac{W_{Cu}}{E_{Cu}}$
$\therefore \frac{27}{108}=\frac{W_{Cu}}{31.8}$
$\therefore W_{Cu}=7.95g$