Ionisation Of Amino Acid And Ph Lab Report

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Explain the relationship between the ionisation of amino acids and pH

|Structural diagram of the neutral structure| |Structural diagram of positively charged structure|

|Structural diagram of negatively charged structure|

Explain how the form of an amino acid, whether positively charged, negatively charged or neutral, depends of the pH of the solution ?
If you increase the pH of a solution of an amino acid by adding hydroxide ions, if this is done then the hydrogen ions will then be removed from the -NH3+group .
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To test if it is now a negative ion a process called electrophoresis.although it is colourless its position can be detected using ninhydrin. If the amino acid has dried and then heated gently it would appear as

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