Practice question
Question
A solution is made by mixing 30 g of a solute (molar mass = 60 g/mol) with water. If the molality is 0.5 mol/kg, what is the total mass of the solution?
Explanation
Moles of solute = (30/60) = 0.5 mol . Molality = (Moles/Mass of solvent in kg) , 0.5 = (0.5/w) . w = 1 kg = 1000 g . Total mass = 30 + 1000 = 1030 g .
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