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Question

10 mL of 1 M BaCl2 solution and 5 mL of 0.5 M K2SO4 are mixed together to precipitate out BaSO4. The amount of BaSO4 precipated will be :

A
0.005 mol
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B
0.00025 mol
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C
0.025 mol
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D
0.0025 mol
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Solution

The correct option is D 0.0025 mol
BaCl2+K2SO4BaSO4+2KCl
10 mL of 1 M BaCl2 and 5 mL of 0.5 M K2SO4 are mixed together.
Here, K2SO4 is the limiting reagent.
1 mmol K2SO41 mmol BaSO4
2.5 mmol K2SO42.5 mmol BaSO42.51000=0.0025 mol BaSO4

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