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Answer to Question #52982 in Organic Chemistry for shane

Question #52982
Barium sulfate, BaSO4, is so insoluble that it can be swallowed without significant danger, even though Ba2+ ions are toxic. At 25 °C, 1.00 L of water dissolves only 0.00245 g BaSO4. Calculate Ksp for BaSO4.
Expert's answer
Moles of dissolved BaSO4 = 0.00245 g / 233.43 g/mol = 0.0000105 mol;
[Ba2+]= [SO42-] = 0.0000105mol/ 1.00 L = 0.0000105 M;
Ksp = [Ba2+][SO42-]=(0.0000105)2 =1.1 x 10-10

Answer: 1.1 x 10-10

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