Question

65g of glucose is dissolve in 435g of water.Calculate the concentration of solution

Answer 1

Answer: 0.83 m

Explanation:

Molality of a solution is defined as the number of moles of solute dissolved per kg of the solvent.

$Molarity=\frac{n\times 1000}{W_s}$

where,

n= moles of solute

$Moles=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{65g}{180g/mol}=0.36moles$  

$W_s$ = weight of solvent (water) = 435 g

$Molality=\frac{0.36\times 1000}{435}=0.83m$

Therefore, the concentration of the solution is 0.83 m.