A solution containing 2 g of a non-volatile solute in 20 g of water boils at 373.52 K. The molecular mass of the solute is g mol⁻¹. (Nearest integer)

Given: water boils at 373 K, for water = 0.52 K

Question

A solution containing 2 g of a non-volatile solute in 20 g of water boils at 373.52 K. The molecular mass of the solute is  g mol⁻¹. (Nearest integer)

Given: water boils at 373 K,  for water = 0.52 K kg mol⁻¹

Canvas Classes · Accepted Answer

Strategy:
 Elevation in boiling point () is a colligative property that relates to the molality () of the solution. First, find the elevation constant, then the molality, and finally use the mass of the solute to find its molar mass.

Step 1: Calculate the elevation in boiling point ()

Step 2: Calculate the molality of the solution
Using the formula :
-

Step 3: Determine the moles of solute
Molality () = 
Mass of solvent (water) = 20 g = 0.02 kg.

Step 4: Calculate the molecular mass of t

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