Question #69afb

1 Answer
il maestro · Stefan V.
Feb 24, 2018

b) pH=3

Explanation:

At pH=3, glutamate is in the zwitterionic form:

HOOC−CH2−CH2−CH−(NH+3)(COO−)

and has no net charge, whilst at pH=2.19, it has one half net positive charge, at pH=4.25, it has about half net negative charge. At pH=7 it has one net negative charge and at pH=9.25, it has a one and half net negative charge.

The more net charges (positive or negative) on the molecule, the better will be the solvation by polar solvents like water.

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