Question

Copper is a divalent metal. The value of its electrochemical equivalent is $3.29 \times 10^{-4}\, g$ . Its atomic mass is

• A. $31.74\,g$
• B. $63.5 \,g$
• C. $126.9\, g$
• D. $15.87 \,g$

Answer 1

Answer: (B)

$63.5 \,g$

Answer 2

Electrochemical equivalent, $Z=\frac{E}{96500}$

or $3.29 \times 10^{-4}=\frac{E}{96500}$
$\therefore E=31.74$

Atomic mass $=2 \times E$
$[\because$ Cu is divalent]

$= 2\times 31.74$
$=63.49\,g$