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18/10/2021 2:30 pm
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What is the minimum concentration of SO42- required to precipitate BaSO4 in a solution containing 1.0 × 10-4 mole of Ba2+? Ksp for BaSO4 = 4 × 10-10
(a) 4 × 10-10 M
(b) 2 × 10-7 M
(c) 4 × 10-6 M
(d) 2 × 10-3 M
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18/10/2021 2:38 pm
Correct answer: (c) 4 × 10-6 M
Explanation:
[Ba2+][SO42-]
Ksp = (1.0 x 10-4 )[SO42-] = 4 × 10-10
∴ [SO42-] = 4 x 10-6 M