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Equilibrium
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20/10/2021 10:52 am
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How many gms of CaC2O4 will dissolve in one litre of saturated solution. Ksp of CaC2O4 is 2.5 × 10-9 mol2 lit-2
(a) 0.0064 g
(b) 0.0128 g
(c) 0.0032 g
(d) None of these
1 Answer
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20/10/2021 10:59 am
Correct answer: (a) 0.0064 g
Explanation:
CaC2O4 ⇌ Ca2+ + C2O42-; Ksp = S2
∴ S = \(\sqrt{K_sp}\) = \(\sqrt{2.5 \times 10^{-9}}\) = 5 x 10-5 mol/litre
solubility = 5 x 10-5 x 128 = 0.0064g