Q. The ionic strength of solution containing 0.1 mol/kg of KCl and 0.2 mol/kg of $Cu\ {SO}_{4}\$is
A) 0.3
B) 0.6
C) 0.9
D) 0.2
Explanation
(a)
In solution the KCl and $Cu{SO}_{4}$ produces same number of ions in solution.
$KCl\ \rightleftharpoons \ K^{+}\ + \ {Cl}^{-}\ \$
$\ Cu{SO}_{4}\ \rightleftharpoons \ {Cu}^{2 +}\ + \ {{SO}_{4}}^{2 -}\ \$
Both produced two ions in solution.
So, ionic strength of a solution is combined ionic strength of both of the salt.
=0.1+.02=0.3 mol/kg
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.