1.

Concentrated aqueous sulphuric acid is 98% H_(2)SO_(4) by mass and has a density of 1.84"g cm"^(3). What volume of the concentrated acid is required to make 5.0 litre of 0.500 M H_(2)SO_(4) solution?

Answer»


Solution :`98% H_(2)SO_(4)` by mass means 98 g `H_(2)SO_(4)` are PRESENT in 100 g of the solution `=100//1.84cm^(3)`
`=54.35cm^(3)=0.5435L`
Molar mass of `H_(2)SO_(4)="98 g mol"^(-1)`
`therefore"MOLARITY of the GIVEN solution"("1 mol")/(0.5435L)=18.4M`
Applying `""M_(1)V_(1)=M_(2)V_(2),18.4xxV_(1)=5xx0.500 or V_(1)=0.136L=136cm^(3)`


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