Answer to Question #110381 in General Chemistry for Lauren Barad

Question

An unknown nonelectrolyte is dissolved in 1kg of solvent and the boiling point is increased by 10oC. Given that the boiling point elevation constant (Kb) is 1.00oC/m, determine the number of moles of solute present in the solution.

a. 1 mol
b. 5 mol
c. 8 mol
d. 10 mol

Answer 1

Solution.

$\Delta T = Kb \times Cm$

Cm = 10 mol/kg

$Cm = \frac{n}{m(solvent)}$

$n = Cm \times m(solvent)$

n = 10 mol

Answer:

d