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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
Concentration of the $Ag^+$ ions in a saturated solution of $Ag_2C_2O_4$ is $2.2 \times 10^{-4}\, mol\, L^{-1} .$ Solubility product of $Ag_2C_2O_4$ is
  • A
    $2.66 \times 10^{-12}$
  • B
    $4.5 \times 10^{-11}$
  • ✓
    $5.3 \times 10^{-12}$
  • D
    $2.42 \times 10^{-8}$
✓

Answer

Correct option: C.
$5.3 \times 10^{-12}$
c
$\mathrm{Ag}_{2} \mathrm{C}_{2} \mathrm{O}_{4} \rightleftharpoons 2 \mathrm{Ag}^{+}+\mathrm{C}_{2} \mathrm{O}_{4}^{2-}$

$\quad \quad \quad 2.2 \times 10^{-4} \mathrm{M} \quad 1.1 \times 10^{-4} \mathrm{M}$

$\mathrm{K}_{\mathrm{sp}}=\left[\mathrm{Ag}^{+}\right]^{2}\left[\mathrm{C}_{2} \mathrm{O}_{4}^{2-}\right]$

$=\left[2.2 \times 10^{-4}\right]^{2} \cdot\left[1.1 \times 10^{-4}\right]$

$\mathrm{K}_{\mathrm{sp}}=5.3 \times 10^{-12}$

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