Question

the normality of 1M solution of H3 PO4 is: [ H=1, P=31, O=16]​

Answer 1

1 mol of H

3

PO

4

gives 3 moles of H

+

ions

In Phosphoric acid (H

3

PO

4

) no. of H

+

ions it produces on dissociation per molecule of acid is 3. Hence the n-factor for phosphoric acid H

3

PO

4

is 3.

Normality= Molarity ×n−factor

=1× 3 =3 N

Hence, the correct option is D

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