Paper Chromatography Report Form Page 2

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Questions:
1. What is the maximum value for R
? ___________
f
2. How do your R
values for your unknown compare with the R
values for the known?
f
f
Explain possible causes for major differences.
3. For a particular unknown, the solvent travels 8.2 cm, while the spot travels 3.2 cm. What
is the R
value for this unknown? (Show calculations)
f
4. Explain the effect of the following on your experimental results:
a) The beaker was moved after the filter paper with spots were placed in it.
b) The filter paper was left too long in the beaker with solvent.
5. Complete the sentence below:
Spots traveling higher on the filter paper have _____________________R
values, while
f
(larger/smaller)
spots traveling lower on the filter paper have ______________________R
values.
f
(larger/smaller)
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