Stoichiometry

2.5g of BaO and CaO when heated with excess H₂ SO₄ , produced 4.713g of mixed sulphates. Find the percentage of BaO present in mixture

1 Answers

106

Bitan Chakraborty ·2013-04-01 04:36:06

CaO + H₂SO₄ â†’ CaSO₄ + H₂O
(56)........(98)...........(136)
BaO + H₂SO₄ â†’ BaSO₄ + H₂O
(153)......(98)...........(233)

Let there be x g of BaO and (2.5 - x) g of CaO

153 g of BaO gives 233 g of BaSO₄
So, x g of BaO gives 233153x g of BaSO₄ = 1.5229x g of BaSO₄

Similarly,
56 g of CaO gives 136 g of CaSO₄
So, (2.5 - x) g of CaO gives 13656(2.5 - x) g of CaSO₄ = 2.4286x g of CaSO₄

Thus,
1.5229x + 2.4286x = 4.713
or, x = 1.49994

% BaO = 1.499942.5 = 59.97

Ans: 59.97 % of BaO is present in the mixture.

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