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

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry6.2. Equilibrium - II (icon Equilibrium)1 Mark
MCQ
The solubility product of silver sulphide is $3.2 \times {10^{ - 11}}.$ Its solubility at the experimental temperature is 
  • ✓
    $2 \times {10^{ - 4}}$ moles per litre
  • B
    $6 \times {10^{ - 6}}$ moles per litre
  • C
    $1.2 \times {10^{ - 5}}$ moles per litre
  • D
    $8 \times {10^{ - 4}}$ moles per litre
✓

Answer

Correct option: A.
$2 \times {10^{ - 4}}$ moles per litre
(a) $A{g_2}S  \rightleftharpoons  2A{g^ + } + {S^{ - \,\, - }}$

${K_{sp}} = 4{S^3}$

$S = \sqrt[3]{{\frac{{{K_{sp}}}}{4}}}$$ = \sqrt[3]{{\frac{{3.2 \times {{10}^{ - 11}}}}{4}}} = 2 \times {10^{ - 6}}$

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