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AP EAMCET2007ChemistryIonic Equilibrium

Which of the following is not a conjugate acid-base pair?

Options

  1. AHPO ₃²⁻, PO ₃³⁻
  2. BH ₂ PO ₄⁻, HPO ₄²⁻
  3. CH ₂ PO ₄⁻, H ₃ PO ₄
  4. DH ₂ PO ₄⁻, PO ₃³⁻

Correct answer

D. H ₂ PO ₄⁻, PO ₃³⁻

Step-by-step solution

aligned & Acid ₁+ Base ₂ Acid ₂+ Base ₁ & HPO ₃²⁻+ H ₂ O H ₃ O ⁺+ PO ₃³⁻ & H ₂ PO ₄⁻+ H ₂ O H ₃ O ⁺+ HPO ₄²⁻ & H ₃ PO ₄+ H ₂ O H ₃ O ⁺+ H ₂ PO ₄⁻ aligned

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