Question

Which of the following would you expect to happen to a sample of water with the salt potassium iodide (KI) added to it?

Answer 1

Answer: d

Explanation:

Answer 2

The correct answer is A: Vapor pressure lowering.

Certain properties in chemistry are called colligative properties. These colligative properties depends on the amount of solute present.

Examples of colligative properties include;

• Vapor pressure lowering
• Freezing point depression
• Boiling point elevation
• Osmotic pressure

When a solute is introduced into water, the vapour pressure of water is lowered.

Hence, when KI is added to a sample of water, vapor pressure lowering occurs.

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