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. Which solute, when dissolved in 1 kg H2O, will give the solution with the highest boiling point? (A) 50 g ethylene glycol, HOCH2CH2OH (B) 50 g hydroxyacetic acid, HOCH2COOH (C) 50 g glycerol, HOCH2CHOHCH2OH (D) 50 g glyoxal, HCOCHO

1 Answer

1 vote

Answer:

D is the correct option.

Step-by-step explanation:

In order to explain all the solutes from the excersise, the lowest molar mass will give the solution, the highest boiling point.

ΔT = Keb . m

Molality = mol of solute / 1kg of solute

Mol of solute = mass / molar mass

If the molar mass↓ it's small, mol of solute will be↑

Mol of solute ↑ , generates high molality

ΔT ↑ = Kf . m ↑

If the molality is high, the difference between the temperautes, will be high, so the boiling point from solution, will be higher.

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