At iso-electric point:

conc of cation is equal to conc of anion

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Net charge is zero

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Maximum conc. of di-polar ion (Zwitter ion) will be present

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All of the above

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Solution

The correct option is D All of the above
The $p H$ at which a molecule has a total electric charge zero or electrically neutral is the isoelectric point ( $p^{I}$ ) of the molecule.
For total charge to be zero, the concentration of cation must be equal to that of anion.
Also, maximum the concentration of Zwitter ion will also be present.

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6

3

6

H^{+}

F e (O H)_{3 (s)} ⇌ F e_{(a q)}^{3 +} + 3 O H_{(a q)}^{-}

O H^{-}

\frac{1}{3}

F e^{3 +}

[p K_{a} = 5]

= 1.5 M

= 0.15 M

O H^{-}

1 l i t r e

N H_{4} C l

N H_{4} O H

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