(i) H ₃ PO ₄(a q) H ⁺(a q)+ H ₂ PO ₄⁻(a q) (ii) H ₂ PO ₄⁻(a q) H ⁺(a q)+ HPO ₄²⁻(a q) (iii) HPO ₄²⁻(a q) H ⁺(a q)+ PO ₄³⁻(a q) The equilibrium constants for the above reactions at a certain temperature are K₁, K₂ and K₃ respectively. The eq

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(i) H ₃ PO ₄(a q) H ⁺(a q)+ H ₂ PO ₄⁻(a q) (ii) H ₂ PO ₄⁻(a q) H ⁺(a q)+ HPO ₄²⁻(a q) (iii) HPO ₄²⁻(a q) H ⁺(a q)+ PO ₄³⁻(a q) The equilibrium constants for the above reactions at a certain temperature are K₁, K₂ and K₃ respectively. The equilibrium constant for the reaction H ₃ PO ₄(a q) 3 H ⁺(a q)+ PO ₄³⁻(a q) in terms of K₁, K₂ and K₃ is

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Correct answer: D. K₁ K₂ K₃

Required relation aligned & H ₃ PO ₄(a q) 3 H ⁺(a q)+ PO ₄³⁻(a q) & K= [ H ⁺ ]^3 [ PO ₄³⁻ ] [ H ₃ PO ₄ ] aligned For reaction (i) For reaction (ii) For reaction (iii) On multiplying (i),(i i) and (i i i)K=K₁ K₂ K₃

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