Question

6 gm of glucose is mixed with water to prepare 100 gm soln of density 1.2 g /mol.
Calculate
1.strength of the soln
2.molarity
3.molality
4.mole fraction of solute
5.mole%of solute

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Answer 1

Explanation:

Molality =

mass of solvent in kg

no of moles of solute

Molar mass of glucose = 180g

Mass of glucose =10

No of moles of glucose =

180

10

=0.0556mol

the solution of glucose in water which is 10% w/W means 10 g of glucose in 100 g of solution

Mass of solvenyt=100-10=90 g =0.090 kg

Molality =

0.090

0.556

=0.617m

Hence, the correct option is B