Practice Vapour Pressure Of Liquid Solutions (2.6)

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6 sample questions

Question 1.
What is vapour pressure?
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Think about the relationship between liquid and vapor states.
Question 2.
State Raoult's Law.
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Recall the formula involving partial pressures.
3Question 3.
What does Raoult's Law state about the partial vapour pressure of a component?
- It's independent of its mole fraction
- It is proportional to its mole fraction
- It increases with temperature only
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Think about the relationship described by the law.
4Question 4.
True or False: Non-volatile solutes do not affect the boiling point of a solution.
- True
- False
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Recall how boiling point changes with solute addition.
Question 5.
A mixture contains 0.5 mol of solute A and 1.5 mol of solute B. Calculate the total vapour pressure if the vapour pressures of pure A and B are 100 mmHg and 80 mmHg, respectively.
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Calculate mole fractions before applying the law.
Question 6.
You have 1 mol of NaCl dissociated in 1 kg of water. Find the van’t Hoff factor and explain how it alters expected colligative properties.
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Consider dissociation processes for determining i.

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