Assume that a particular amino acid has an isoelectric point of $6.0$ . In a solution at $p H$ $1.0$ , which of the following species will predominate?

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Solution

The correct option is A
We see that the given condition is highly acidic because `pH=1`. This tells us that there will be a lot of free protons available in solution. Since `H^+` ions are available in solution, the `-NH_2` gets protonated easily and hence the protonated form is the most dominant species at said conditions.

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Similar questions

6.0

p H

1.0

6.0.

1.0

At the isoelectric point for amino acid, the species present are:

^{+} N H_{3} - C H (R) - C O_{2} H

K a_{1} = 10^{- 7}

α

p K a_{2}

α

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