9
QuizMultiple Choice

Colligative Properties

Question 9 • *25-26 KCS18 Chemistry IC

A student stirs 2 tablespoons of honey into a glass of water. How will the addition of honey affect the water’s colligative properties?

Answer
T
The water’s osmotic pressure and vapor pressure will both increase.
T
The water’s osmotic pressure and vapor pressure will both decrease.
T
The water’s osmotic pressure will increase, and its vapor pressure will decrease.
T
The water’s osmotic pressure will decrease, and its vapor pressure will increase.

Explanation

Dissolved honey adds solute particles to the water. More dissolved particles increase the water’s osmotic pressure, while the solute lowers the fraction of water molecules at the surface that can escape into vapor, decreasing vapor pressure. Thus, osmotic pressure increases and vapor pressure decreases.

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