An ore is treated with concentrated nitric acid and potassium chlorate to convert all S (32.06 g/mol) to sulfate. The nitrate and chlorate are then removed by repeated furning with concentrated HCl, and the sulfate is precipitated and weighed as BaSO4 (233.40 g/mol). What is the % (w/w) S in an ore, 2.5000 g of which yields 0.6255 g BaSO4 . 3.44 % (w/w) 3.34 x 10-3% (w/w) 18.21 % (w/w) 24.31 % (w/w)

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An ore is treated with concentrated nitric acid and potassium chlorate to convert all S (32.06 g/mol) to sulfate. The nitrate and chlorate are then removed by repeated furning with concentrated HCl, and the sulfate is precipitated and weighed as BaSO₄ (233.40 g/mol). What is the % (w/w) S in an ore, 2.5000 g of which yields 0.6255 g BaSO₄ .

3.44 % (w/w)

3.34 x 10^-3% (w/w)

18.21 % (w/w)

24.31 % (w/w)

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