A 368 g sample of potassium ferrocyanide (50% pure) is treated with 5.675 L ozone at STP in aqueous medium to form A, B and gas C. The yield is 40%, and B absorbs CO₂. Which statement is correct?
Atomic masses: K 39, Fe 56, C 12, N 14, O 16, H 1.

Question

A 368 g sample of potassium ferrocyanide (50% pure) is treated with 5.675 L ozone at STP in aqueous medium to form A, B and gas C. The yield is 40%, and B absorbs CO₂. Which statement is correct?

Atomic masses: K 39, Fe 56, C 12, N 14, O 16, H 1.

TestHub · Accepted Answer

2K₄[Fe(CN)₆] + O₃ + H₂O → 2K₃[Fe(CN)₆] + 2KOH + O₂. Pure salt = 184 g = 0.5 mol; O₃ = 0.25 mol. At 40% yield, KOH = 0.2 mol. This absorbs 0.1 mol CO₂ = 4.4 g. Therefore C.

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