1.

A compound H_(2)X with molar weight of 80 g is dissolved in a solvent having density of 0.4 g ml^(-1). Assumingno change in volume upon dissolution, the molality of a 3.2 molar solution is

Answer»


Solution :Given 3.2 M solution
`THEREFORE` moles of solute = 3.2 MOL
CONSIDER 1 L Solution.
`therefore` volume of SOLVENT = 1 L
`P_("solvent")=0.4 g.mL^(-1) therefore m_("solvent")=P xx V=400 g`
`therefore` molality `=(3.2 mol)/(0.4 kg)= 8` molal.


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