Sulfuric acid having concentration great...

Sulfuric acid having concentration greater than 98.5% `H_2SO_4` cannot be obtained by distillation of an aqueous solution of `H_2SO_4`. Why?

Text Solution

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Sulfuric acid having 98.5% `H_2SO_4` forms a constant boiling mixture having B.P. of 611 K. Hence, dilute sulfuric acid cannot be concentrated beyond 98.5% by distillation.

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