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Question

0.98g of the metal sulphate was dissolved in water and excess of barium chloride was added. The precipitated barium sulphate weighted 0.95g. Calculate the equivalent weight of the metal.

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Solution

Barium Sulphate molecular weight =233.42 g
molecular weight of SO4=32+16(4)=32+64=96 g
constituent weight of SO4=96233.42=41.1
weight of SO4 in 0.95 g=41.1×0.95100=0.39
the equivalent weight of metal is 0.980.39=0.59

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