1.

Calculate the molarity and molality of20 per cent aqueous ethanol (C_(2)H_(5)OH) solution by volume (density of the solution = "0.960 g per cm"^(3)).Assume the solution to be ideal.

Answer»


Solution :ASSUMING the solution to be IDEAL,
`"100 cm"^(3)" of alcohol "+80 cm^(3)" of WATER, 100 cm"^(3)" of solution "=100xx0.960 =96g`
`therefore"96 g of solution = 20 cm"^(3)" of alcohol "+"80 g of water"because"20 cm"^(3)" of alcohol "=96-80 = 16 g.`


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