1. Tardigrade
  2. Question
  3. Chemistry
  4. Three reactions involving H 2 PO 4-are given below: (i) H 3 PO 4+ H 2 O arrow H 3 O ++ H 2 PO 4- (ii) H 2 PO 4-+ H 2 O arrow H 2 PO 4-+ H 3 O + (iii) H 2 PO 4-+ OH -+ H 3 PO 4+ O 2- In which of the above does H 2 PO 4-act as an acid?

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Q. Three reactions involving $H _{2} PO _{4}^{-}$are given below :
(i) $H _{3} PO _{4}+ H _{2} O \rightarrow H _{3} O ^{+}+ H _{2} PO _{4}^{-}$
(ii) $H _{2} PO _{4}^{-}+ H _{2} O \rightarrow H _{2} PO _{4}^{-}+ H _{3} O ^{+}$
(iii) $H _{2} PO _{4}^{-}+ OH ^{-}+ H _{3} PO _{4}+ O ^{2-}$
In which of the above does $H _{2} PO _{4}^{-}$act as an acid?

AIEEEAIEEE 2010Equilibrium

Solution:

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