Question

Why might not all of the amino acids known to be present in the mixture have appeared on the chromatogram?

Answer 1

Answer:

Explanation: read carefully answer is present but

first a fully lets understand the defination of chromatogram

Chromatography is a laboratory technique for the separation of a mixture.

The mixture is dissolved in a fluid called the mobile phase, which carries it through a system on which a material called the stationary phase is fixed.

                          or else in other words

a visible record (such as a graph) showing the result of separating the components of a mixture by chromatography.

now your answer will be .

Measure the distance that the solvent moved. Why might not all of the amino acids known to be present in the mixture have appeared on your chromatogram? ... Because sweat contains amino acids and the chromatography paper will be contaminate

Answer 2

Chromatography is a process for separating components of a mixture. The sweat contains amino acids and the chromatography paper will be contaminated.

Explanation:

• The different components of the mixture travel through the stationary phase at different speeds, causing them to separate from one another.
• Ink that is attracted to the solvent will move towards the top of the paper.
• Ink that is attracted to the paper will stay near the bottom. Attractions are most commonly due to polarity of the molecules.
• Polar inks are attracted to polar solvent, nonpolar inks are attracted to nonpolar paper.
• A mixture of unknown amino acids can be separated and identified by means of paper chromatography.
• The position of the amino acids in the chromatogram can be detected by spraying with ninhydrin, which reacts with amino acids to yield highly colored products.