Colligative Properties

When KCl (potassium chloride) is dissolved in water, how many particles are in solution?

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When CaBr₂ is dissolved in water, how many particles will be in solution?

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When CH₃OH is dissolved in water, how many particles are in solution?

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Colligative properties depend on the _____ of solute particles in solution.

• type
• number
• pH
• nature

The freezing point of a solution is ____ the freezing point of the pure solvent.

• the same as
• lower than
• higher than
• no relation to

The boiling point of a solution is ______ the boiling point of the pure solvent.

• higher than
• the same as
• lower than
• higher or lower than

The vapor pressure of a pure solvent is ___________ that of a solution

• more than

• less than

• equal to

Which one of the following diagrams has the lowest vapor pressure?

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Which of the following solutions will have the lowest freezing point? (Hint: who makes the most particles when dissolved?)

• 1.0 M C₁₂H₂₂O₁₁

• 1.0 M LiCl

• 1.0 M Na₃P

• 1.0 M MgF₂

Which of the following compounds will be most effective in melting the ice on the roads when the air temperature is below zero?

• sodium iodide (NaI)

• magnesium sulfate (MgSO₄)

• potassium bromide (KBr)

• all will be equally effective