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InterviewSolution
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751.84 g mixture of Caco, and MgCO, was heated to a constant weight till 0.96 g residue formed % MgCO3in sample was(1) 45.66%(3) 30%(2)(4)54.34%70% |
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Answer» Let the mass of CaCO3 be X gramSo,the mass of MgCo3 will be 1.84-X grams.Now,X grams of CaCO3 will give Cao=56X/100 gAnd,1.84-X grams of MgCO3 will give MgO=40(1.84-X)/84 gTotal mass of residue is 0.96 gSo,o.56+40(1.84-X)/84 g=0.96 g.°. X=1gramHence, % composition of CaCO3 =1/1.84×100=54.35%And,% composition of MgCO3=100%-54.35%=45.65% |
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