Question

A certain sample of cuprous sulphide is found to have the composition $C{u}_{192}{S}_{100}$ because of incorporation of $C{u}^{2+}$ and $C{u}^{+}$ ions in the crystal then ratio of $C{u}^{2+}$ and $C{u}^{+}$ ions is:

• A. 0.08 : 1.00
• B. 1 : 23
• C. 1 : 24
• D. 1 : 1

Answer 1

The correct option is B 1 : 23

Let, $x$ number of $C{u}^{+2}$ are present in $192$ $Cu$ atoms

Now, $2x+192-x=100\times 2$

$x=8$

$C{u}^{+2}=8$ , $C{u}^{+}=192$

$C{u}^{+2}:C{u}^{+}\Rightarrow 8:192=1:23$