The volume of the water needed to dissolve 1 g of BaSO4KSP = 1.1×10-10 at 250C is

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280 litre

410 litre

205 litre

None of these

answer is B.

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Detailed Solution

Solubility of BaSO4, S = KSP = 1.1× 10-10 =1.05× 10-5 M ∴ Wt. of BaSO4 = 1.05× 10-5 × 233(S=W/M) = 244.37× 10-5 g/L∴ Volume of water needed to dissolve 1 g BaSO4 is equal to1244.37× 10-5 = 410 L

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