MCQ
A salt $MX$ has $K_{sp}$ = $4 × 10^{-10}$ . What value of $K_{sp}$ must another salt $MX_3$ have if the molar solubility of the two salts is to be identical
- A$3.2 × 10^{-10}$
- B$1.024 × 10^{-19}$
- C$1.78 × 10^{-5}$
- ✓$4.32 × 10^{-18}$
✓
Answer
Correct option: D.
$4.32 × 10^{-18}$
d
Solubility of $MX$ = $(4 × 10^{-10})^{1/2}$
Solubility of $MX$ = $(4 × 10^{-10})^{1/2}$
$MX_3$ : $K_{sp}$ = $27s^4$
= $27 (2 × 10^{-5})^4$
= $4.32 × 10^{-18}$
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