JEE Main 2016 Chemistry question
The amount of arsenic pentasulphide that can be obtained when g arsenic acid is treated with excess in the presence of conc. HCl (assuming 100% conversion) is
Answer: (4)
Solution
Arsenic acid is , with molar mass g mol, so g is mol. The reaction with hydrogen sulphide is
2H_3AsO_4 + 5H_2S →
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