AP Chemistry 3.9: Separation of Solutions and Mixtures
Practice AP Chemistry 3.9 questions on chromatography and distillation using differences in polarity, vapor pressure, and intermolecular forces.
- Syllabus
- Effective Fall 2025
- Course
- AP Chemistry
Exam points
- Use periodic trends and bonding models to predict acid–base behavior, redox tendency, and chemical reactivity.
- Interpret electronegativity, oxidation state, and electron-transfer data to explain reaction outcomes.
Covered syllabus points
3.9 Separation of Solutions and Mixtures question 1
[Maximum number: 1]
A student conducts a chromatography experiment and needs to prepare 100.0 mL of 0.340 M NaCl(a q) to use as the solvent.
A second student conducts the same chromatography experiment but removes the chromatography paper from the chamber after 15 minutes instead of 30 minutes. Predict the effect, if any, this would have on the separation distance between compounds X and Y in the new experiment. Explain your reasoning.
For the correct prediction and a valid explanation:
It would decrease. The solvent front will not travel as far in the second experiment, so the separation will be smaller.
1 point
Total for question 74 points
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