In the sulphur estimation 0.20 g of a pure organic compound gave 0.40 g of barium sulphate.

The percentage of sulphur in the compound is %.

(Molar mass: O = 16, S = 32, Ba = 137 in g mol)

Question

In the sulphur estimation 0.20 g of a pure organic compound gave 0.40 g of barium sulphate.

The percentage of sulphur in the compound is  %.

(Molar mass: O = 16, S = 32, Ba = 137 in g mol)

Canvas Classes · Accepted Answer

Strategy:
 sulfur estimation (Carius method) converts all Sulfur to . Find the mass of Sulfur in the precipitate and calculate its percentage in the original compound.

Step 1: Calculate mass of Sulfur
Molar mass of .

Step 2: Calculate percentage

In format :
.

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