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6.2. Equilibrium - II (icon Equilibrium) — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry6.2. Equilibrium - II (icon Equilibrium)1 Mark
MCQ
On adding $0.1\, M$ solution each of $[Ag^+], [Ba^{2+}], [Ca^{2+}]$ in a $Na_2SO_4$ solution, species first precipitated is $[K_{sp}\, BaSO_4 = 10^{-11}, K_{sp}\, CaSO_4 = 10^{-6}, K_{sp}\,Ag_2SO_4 = 10^{-5}]$
  • A
    $Ag_2SO_4$
  • ✓
    $BaSO_4$
  • C
    $CaSO_4$
  • D
    All of these
✓

Answer

Correct option: B.
$BaSO_4$
b
The species having minimum value of $K_{sp}$ will get precipitated first of all because ionic product will exceed the solubility product of such a species. The $K_{sp}$ value is minimum for $BaSO_4(10^{-11})$, so, $BaSO_4$ will get precipitated first of all.

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