Practice question
Question
In the Carius method, 0.15 g of a compound gave 0.287 g of AgCl. If the same sample in Kjeldahl’s method neutralized 10 mL of 0.1 M H₂SO₄, what is the percentage of chlorine?
Explanation
Mass of Cl = (35.5/143.5) × 0.287 = 0.071 g. Percentage = (0.071/0.15) × 100 = 47.33% ≈ 47%. Kjeldahl’s data is for nitrogen, irrelevant here.
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