Practice Abnormal Molar Mass Characteristics (1.5.1) - Solutions

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6 sample questions

Question 1.
Define colligative properties.
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Remember the definition based on particle quantity.
Question 2.
What is the van’t Hoff factor for a solute that does not dissociate?
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Consider how many particles are in solution.
3Question 3.
What happens when a solute dissociates?
- Increases particle count
- Decreases particle count
- No change
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Think about how many ions are created.
4Question 4.
True or False: The van’t Hoff factor can be greater than 1.
- True
- False
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Consider what happens to ionic compounds.
Question 5.
If 0.2 moles of NaCl is dissolved in 1 liter of water, what is the expected van’t Hoff factor given its full dissociation?
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Think about how the dissociation affects the total ‘particles’.
Question 6.
A solution of acetic acid shows effective molar mass significantly higher than expected at low concentrations. Suggest the probable reason.
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Link changes in concentration to particle behavior.

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