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100 mL of a 20.8% (w/v) BaCl2 solution is mixed with 50 mL of a 9.8% (w/v) H2SO4 solution. Find the mass of BaSO4 precipitated. (Ba = 137, Cl = 35.5, S = 32, H = 1, O = 16)

1. 11.65 g
2. 33.2 g
3. 23.3 g
4. 30.6 g

Correct answer: 11.65 g

Solution

H2SO4 is limiting at 0.05 mol, producing 0.05 mol BaSO4 of mass 11.65 g.

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