AP Chemistry
3.9 Separation of Solutions and Mixtures
A student performs paper chromatography on a mixture of two dyes, Dye 1 and Dye 2, using cellulose paper as the stationary phase and ethanol, \(\text{C}_2\text{H}_5\text{OH}\) (a polar solvent), as the mobile phase. The experimental results are shown in the table below.
If the student repeats the experiment using hexane, \(\text{C}_6\text{H}_{14}\) (a nonpolar solvent), as the mobile phase, which of the following predictions regarding Dye 1 is correct, and why?
| Dye | Solvent Front Distance (cm) | Dye Distance (cm) |
|---|---|---|
| Dye 1 | \(10.0\) | \(8.0\) |
| Dye 2 | \(10.0\) | \(3.0\) |
If the student repeats the experiment using hexane, \(\text{C}_6\text{H}_{14}\) (a nonpolar solvent), as the mobile phase, which of the following predictions regarding Dye 1 is correct, and why?
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