SOLUTION: Chemistry paper chromatography worksheet - Studypool - Free Printable

Problem Analysis:

The question involves a chromatography experiment where five different solutions of amino acids (A–E) are analyzed. The goal is to determine which amino acids are present in solution E, which contains an unknown mixture of amino acids. The chromatogram shows the separation of these amino acids based on their retention times or migration distances.

Given Information:

1. Solution A contains cysteine.
2. Solution B contains glycine.
3. Solution C contains alanine.
4. Solution D contains valine.
5. Solution E contains an unknown mixture of amino acids.
6. The chromatogram shows the positions of the spots corresponding to each solution.

Chromatogram Analysis:

- Each spot on the chromatogram represents the position of a specific amino acid after the chromatography process.
- The positions of the spots for solutions A, B, C, and D are known, as they correspond to cysteine, glycine, alanine, and valine, respectively.
- Solution E has multiple spots, indicating the presence of more than one amino acid.

Step-by-Step Solution:

1. Identify the spots for known amino acids:
- The spot under A corresponds to cysteine.
- The spot under B corresponds to glycine.
- The spot under C corresponds to alanine.
- The spot under D corresponds to valine.

2. Analyze the spots in solution E:
- Solution E has two distinct spots.
- One spot aligns with the position of cysteine (under A).
- The other spot aligns with the position of alanine (under C).

3. Determine the composition of solution E:
- Since the spots in solution E match the positions of cysteine and alanine, it indicates that solution E contains both cysteine and alanine.

Conclusion:

The amino acids present in solution E are cysteine and alanine.

Final Answer:

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\]