Question

The solubility product of NaCl is $2.5\times {10}^{-9}$ $mole{s}^2/li{t}^2$. Its solubility is:

• A. $2.5\times {10}^{-9}mol/lit$
• B. $5\times {10}^{-5}$ $mole{s}^2/li{t}^2$
• C. $5\times {10}^{-5}mol/lit$
• D. $1.3\times {10}^{-5}mol/lit$

Answer 1

The correct option is C $5\times {10}^{-5}mol/lit$

$K_{sp}=s^2$
=>$s=\sqrt{K_{sp}}=5\ast {10}^{-5}$