Question

What is a conjugate acid–base pair for the following equilibrium?
H2O(l) + HPO4 2- (aq) D H2PO4 -(aq) + OH- (aq)

Answer 1

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Answer on Question #48421, Chemistry, Other

Task:

What is a conjugate acid-base pair for the following equilibrium?

$$\mathrm{H_2O(l) + HPO_4^{2-}(aq) = H_2PO_4^-}(aq) + \mathrm{OH^-}(aq)$$

Answer:

In a reaction a substance, which donates proton is called acid; a substance, which receives proton is called base.

In the given example conjugated acid-base pairs are:

acid 1 acid 2 base2 base 1

$$\mathrm{H_2O(l) + HPO_4^{2-}(aq) = H_2PO_4^-}(aq) + \mathrm{OH^-}(aq)$$