Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. A complex is represented as $CoCl_{3}.xH_{2}O$ . Its $\text{0} \text{.1} \, \text{m}$ solution in aqueous medium shows $\Delta T_{f}= \, 0.558 \, K$ . $K_{f}$ for water is $1.86 \, kg \, m o l^{- 1} \, K$ and assuming $\text{100\%}$ ionisation of the complex having coordination number $\text{6}$ . The formula of the complex is

NTA AbhyasNTA Abhyas 2022

Solution:

$\Delta T_{f}=i\times K_{f}\times m$
$0.558=i\times 1.86\times 0.1\Rightarrow i=3$
So, the total no of ions produce by complex per mole should be $3$
$\left[ Co \left( H _{2} O \right)_{5} Cl \right] Cl _{2} \rightarrow\left[ Co \left( H _{2} O \right)_{5} Cl ^{2+}+2 Cl ^{-}\right.$