Solved: Writing Equations for Proton-Transfer ReactionsThe

Chapter , Problem 1PE

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Problem 1PE

Writing Equations for Proton-Transfer Reactions

The hydrogen sulfite ion (HS03 -) is amphiprotic. Write an equation for the reaction of HS03 - with water

(a)        in which the ion acts as an acid and

(b)        in which the ion acts as a base. In both cases identify the conjugate acid-base pairs.

The dihydrogen phosphate ion, H2P04 - , is amphiprotic. In which of the following reactions is this ion serving as a base?

(i) H3O+(aq) + H2PO4 - (aq) ⇌ H3PO4(aq) + H2O(l), (ii) H3O+(aq) + HPO42 - (aq) ⇌  H2PO4 - (aq) + H2O(l), (iii) H3PO4(aq) + HPO42-(aq) ⇌ 2 H2PO4- (aq)

(a) i only, (b) i and ii, (c) i and iii, (d) ii and iii, (e) i, ii, and iii