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158 grams of potassium permanganate is reacted with ferrous sulfide in the presence of hydrochloric acid, approximately how much ferric sulfate will i

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158 grams of potassium permanganate is reacted with ferrous sulfide in the presence of hydrochloric acid, approximately how much ferric sulfate will it produce?

(a) 111 grams

(b) 169 grams

(c) 254 grams

(d) 399 grams
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Right choice is (a) 111 grams

For explanation: The balanced chemical reaction is 18KMnO4 + 10FeS + 32H2SO4 -> 18MnSO4 + 5Fe2(SO4)3 + 9K2SO4 + 32H2O, => weight of ferric sulfate = (158/158)*(5/18)*400 = 111.1 grams ≈ 111 grams.
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