A solution contains 22.0 g of HCl dissolved in sufficient water to give a total mass of 125.0 g. What is the molality of the solution?
A)0.250 m
B)5.86 m
C)2.75 m
D)4.83 m
E)0.176 m

Question

Quizplus · Accepted Answer

The molality of a solution is calculated using the formula: molality = moles of solute / kilograms of solvent. The molar mass of HCl is approximately 36.46 g/mol. Thus, the moles of HCl = 22.0 g / 36.46 g/mol = 0.603 moles. The mass of the solvent (water) is the total mass minus the mass of HCl, which is 125.0 g - 22.0 g = 103.0 g = 0.103 kg. Therefore, the molality = 0.603 moles / 0.103 kg = 5.86 m.

A Solution Contains 22