Question

The ratio of number of water molecules in Mohr's salt and potash alum is ________$\times 10^{-1}$

Answer 1

Answer: 5

Mohr's salt : ${\left(N{H}_4\right)}_{2}Fe{\left(S{O}_4\right)}_2\cdot 6H_{2}O$
The number of water molecules in Mohr's salt $=6$
Potash alum : $KAl{\left(S{O}_4\right)}_2\cdot 12H_{2}O$
The number of water molecules in potash alum $=12$
So ratio of number of water molecules in Mohr's
salt and potash alum $=\frac{6}{12}$
$=\frac{1}{2}$
$=0.5$
$=5\times 10^{-1}$