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Rates, equilibrium and pH

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Question 25

The equation shows the acid dissociation of the dihydrogen phosphate ion H2PO4−\text{H}_2\text{PO}_4^-H2​PO4−​ in water:

H2PO4−+H2O⇌HPO42−+H3O+ \text{H}_2\text{PO}_4^- + \text{H}_2\text{O} \rightleftharpoons \text{HPO}_4^{2-} + \text{H}_3\text{O}^+ H2​PO4−​+H2​O⇌HPO42−​+H3​O+

Which pair is a conjugate acid-base pair?

H2PO4−\text{H}_2\text{PO}_4^-H2​PO4−​ and H2O\text{H}_2\text{O}H2​O

HPO42−\text{HPO}_4^{2-}HPO42−​ and H3O+\text{H}_3\text{O}^+H3​O+

H2PO4−\text{H}_2\text{PO}_4^-H2​PO4−​ and HPO42−\text{HPO}_4^{2-}HPO42−​

H2PO4−\text{H}_2\text{PO}_4^-H2​PO4−​ and H3O+\text{H}_3\text{O}^+H3​O+

Rates, equilibrium and pH Questions

  1. A Level
  2. /Chemistry
  3. /Rates, equilibrium and pH