Question
Chemistry Question on Thermodynamics
In 18.25 gram HCL gas and 500 gram water find molality.
Answer
The molar mass of HCl is 1x1 + 35.5x1 = 36.5. The given solution contains 18.25g of HCl gas. The number of moles is 18.25/36.5 = 0.5 mol. The molality is calculated by the formula
Molality (m) = No. of moles of solute / Mass of solvent in kg
Molality = 0.5/0.5 = 1m.