Question

n-factor of orthophosphoric acid may be
(1) 1
(2) 2
(3) 3
(4) All of these
Ans is (4). How?​

Answer 1

Explanation:

Boric acid have a n- factor 1. Coz it don`t have an fulfill octate , it react with water to fulfill it`s octate and have a n factor 1. H3BO3 is weak acid.it firstly take OH- ion from H2O and then it releases H+ of H2O. So it`s nfactor is 1.

Answer 2

Answer: (3) 3

Explanation:

Orthophosphoric acid is phosphoric acid with molecular formula of $H_3PO_4$

${\text{Equivalent weight}}=\frac{\text{Molecular weight}}{n}$

where n = acidity ,for bases  

n= basicity, for acids

n= valency, for elements

n= cationic charge , for compounds

${\text{Equivalent weight}}for H_3PO_4=\frac{\text{Molecular weight}}{basicity}$

$H_3PO_4\rightarrow 3H^++PO_4{3-}$

As $H_3PO_4$ dissociates to give three $H^+$ and thus it has basicity and n factor of 3.