Question

36. Molecular weight of orthophosphoric acid is
M. Its equivalent weight is

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Answer 1

Answer:

98 gm

Explanation:

H3PO4 = 98gm

and equivalent wt =molecular weight/ valency.

it's valency is 3

98/3= 32.67..?

Answer 2

The equivalent weight of orthophosphoric acid will be M/3.

• Orthophosphoric acid which can also be written as H₃PO₄ is a tribasic acid.
• This means that the n-factor of this acid is 3.
• We know that equivalent weight can be achieved by dividing the molecular weight by the n-factor of the compound.
• Thus the equivalent weight of the orthophosphoric acid will be M/3.