Question

Which of the following explanations best describes the mechanism by which solute particles affect the melting point of ice? (A) Melting point is elevated because the kinetic energy of the substance increases. (B) Melting point is elevated because the kinetic energy of the substance decreases. (C) Melting point is depressed because solute particles interfere with lattice formation. (D) Melting point is depressed because solute particles enhance lattice formation.

Name: Problem 4, Chapter :
Uploaded: 2020-07-09T17:21:10-08:00
Duration: 41 s
Channel: David Collins

   Which of the following explanations best describes the mechanism by which solute particles affect the melting point of ice?
(A) Melting point is elevated because the kinetic energy of the substance increases.
(B) Melting point is elevated because the kinetic energy of the substance decreases.
(C) Melting point is depressed because solute particles interfere with lattice formation.
(D) Melting point is depressed because solute particles enhance lattice formation.

Instant Answer

Solved by Expert David Collins

07/09/2020

Step 1

The solute particles interfere with the formation of the lattice structure of the solvent. This is because the solute particles get in the way of the solvent molecules, preventing them from arranging themselves in the regular pattern of a lattice. Show more…

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Which of the following explanations best describes the mechanism by which solute particles affect the melting point of ice? (A) Melting point is elevated because the kinetic energy of the substance increases. (B) Melting point is elevated because the kinetic energy of the substance decreases. (C) Melting point is depressed because solute particles interfere with lattice formation. (D) Melting point is depressed because solute particles enhance lattice formation.

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Key Concepts

Colligative Properties

This concept refers to the effects that solute particles have on the physical properties of a solvent, independent of the chemical identity of the solute. Properties such as boiling point elevation, freezing point depression, vapor pressure lowering, and osmotic pressure depend primarily on the number of dissolved particles rather than their specific characteristics.

Freezing Point Depression

This phenomenon occurs when the addition of solute particles interferes with the ability of the solvent molecules to arrange themselves into a solid crystalline structure. As a result, the temperature at which the solvent freezes is lowered, a key explanation in colligative property behavior.

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