Explore AP Chemistry 3.9.A questions on explaining chromatography and distillation results using differences in polarity, vapor pressure, and intermolecular forces.
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