Question

Calculate the molality of 10gm of glucose in 90gm of water

Answer 1

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• Given :

weight of solute (glucose) = 10 gm

weight of solvent (water) = 90 gm

molecular weight of glucose = 180 gm/mol

• To Find :

molality of solution.....??

• Formula :

$\boxed{ \bold{ \rm{ \pink{molality = \frac{weight \: of \: solute \times 1000}{molar \: mass \: of \: solute \times weight \: of \: solvent} }}}}$

• Calculation :

$\rm \: molality = \frac{10 \times 1000}{180 \times 90} \\ \\ \star \: \boxed{ \bold{ \red{ \rm{molality = 0.62 \: m}}}} \: \star$