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NEET 2017
Exam
NEET
Year
2017
Subject
Chemistry
Chapter
Ionic Equilibrium

NEET 2017 · Chemistry · Ionic Equilibrium

Concentration of the Ag ^ + ions in a saturated solution of Ag _ 2...

Concentration of the Ag+{Ag}^{+} ions in a saturated solution of Ag2C2O4{Ag}_{2}{C}_{2}{O}_{4} is 2.2×10−4molL−1.2 .2 \times {10}^{- 4}mol{L}^{- 1} . Solubility product of Ag2C2O4{Ag}_{2}{C}_{2}{O}_{4} is

Options

  1. A2.42×10−82.42 \times {10}^{- 8}
  2. B2.66×10−122.66 \times {10}^{- 12}
  3. C4.5×10−114.5 \times {10}^{- 11}
  4. D5.3×10−125.3 \times {10}^{- 12}

Correct answer

D. 5.3×10−125.3 \times {10}^{- 12}

Step-by-step solution

{Ag2C2O4(s)⇌2Ag+(aq)+C2O42−(aq)2ss\begin{cases}{Ag}_{2}{C}_{2}{O}_{4}\left(s\right) & ⇌ & 2{Ag}^{+}\left(aq\right) & + & {C}_{2}{O}_{4}^{2 -}\left(aq\right) \\ 2s & s\end{cases}<br/><br/><br /><br />{K}_{sp} = {\left[{Ag}^{+}\right]}^{2}\left[{C}_{2}{O}_{4}^{2 -}\right]<br/><br/>[Ag+]=2.2×10−4mol/L<br /><br />\left[{Ag}^{+}\right] = 2 .2 \times {10}^{- 4}mol / L

∴[C2O42−]=2.2×10−42M=1.1×10−4M∴ \left[{C}_{2}{O}_{4}^{2 -}\right] = \dfrac{2 .2 \times {10}^{- 4}}{2}M = 1 .1 \times {10}^{- 4}M

∴Ksp=(2.2×10−4)2(1.1×10−4)(mol/L)3∴ {K}_{sp} = {\left(2 .2 \times {10}^{- 4}\right)}^{2}\left(1 .1 \times {10}^{- 4}\right) ( mol / L{)}^{3}

=5.324×10−12(mol/L)3= 5 .324 \times {10}^{- 12} ( mol / L{)}^{3}.
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