MHT CET2008ChemistryIonic Equilibrium
Which one of the following species acts as both Bronsted acid and base?
Options
- AH ₂ PO ₂⁻
- BHPO ₃²⁻
- CHPO ₄²⁻
- DAll of these
Correct answer
C. HPO ₄²⁻
Step-by-step solution
HPO ₄²⁻+ H ₂ O H ₂ PO ₄²⁻+ OH ⁻ HPO ₄²⁻+ H ₂ O PO ₄³⁻+ H ₃ O ⁺ H ₂ PO ₂⁻ is a conjugate base of H ₃ PO ₂ (a monobasic acid) and does not give H ⁺, HPO ₃²⁻ is a conjugate base of H ₂ PO ₃⁻ and does not ionise further, since H ₃ PO ₃ is a dibasic acid.