Solutions Question 217
Question: On dissolving 1 mole of each of the following acids in 1 litre water, the acid which does not give a solution of strength $ 1N $ is [MP PET 1993]
Options:
A) $ HCl $
B) Perchloric acid
C) $ HNO_3 $
D) Phosphoric acid
Show Answer
Answer:
Correct Answer: D
Solution:
$ H_3PO_4 $ ⇌ $ {H^{+}}+H_2PO_4^{-} $
$ H_2PO_4^{-} $ ⇌ $ {H^{+}}+HPO_4^{2-} $
$ HPO_4^{2-} $ ⇌ $ {H^{+}}+PO_4^{3-} $ Phosphoric acid does not give 1N strength.
