Chapter 16, Problem 8A

a.

Interpretation Introduction

Interpretation:The conjugate acid base pairs present in the equation $HF(aq)+H_{2}O(l)\stackrel{}{\rightleftharpoons }{F}^{-}(aq)+H_3{O}^{+}(aq)$ are to be identified.

Concept Introduction:An acid and base pair with the gap of one proton(presence or absence) is called a conjugate acid-base pair.

Answer to Problem 8A

HF,F- and H₃O⁺,H₂O are the two conjugate acid base pairs in the reaction where HF and H₃O+ are the acids and F- and H₂O are the bases.

Explanation of Solution

HF,F- have a proton difference of 1 with HF being an acid and F- being the Lewis base.

H₃O⁺,H₂O have a proton difference of 1 with H₃O+ being an acid and H₂O being the Lewis base. So both of them can be considered conjugate acid-base pairs.

b.

Interpretation Introduction

Interpretation:The conjugate acid base pairs present in the equation $C{N}^{-}(aq)+H_{2}O(l)\stackrel{}{\rightleftharpoons }HCN(aq)+O{H}^{-}(aq)$ are to be identified.

Concept Introduction:An acid and base pair with the gap of one proton(presence or absence) is called a conjugate acid-base pair.

Answer to Problem 8A

HCN,CN- and H₂O,OH- are the two conjugate acid base pairs in the reaction where HCN and H₂O are the acids and CN- and OH- are the bases.

Explanation of Solution

HCN,CN- have a proton difference of 1 with HCN being an acid and CN- being the Lewis base.

H₂O,OH- have a proton difference of 1 with H₂O being an acid and OH- being the Lewis base. So both of them can be considered conjugate acid-base pairs.

c.

Interpretation Introduction

Interpretation:The conjugate acid base pairs present in the equation $HC{O}_3{}^{-}(aq)+H_{2}O(l)\underset{}{\rightleftharpoons }{H}_{2}C{O}_3(aq)+O{H}^{-}(aq)$ are to be identified.

Concept Introduction:An acid and base pair with the gap of one proton(presence or absence) is called a conjugate acid-base pair.

Answer to Problem 8A

H₂CO₃,HCO₃- and H₂O,OH- are the two conjugate acid base pairs in the reaction where H₂CO₃ and H₂O are the acids and HCO₃- and OH- are the bases.

Explanation of Solution

H₂CO₃,HCO₃- have a proton difference of 1 with H₂CO₃ being an acid and HCO₃- being the Lewis base.

H₂O,OH- have a proton difference of 1 with H₂O being an acid and OH- being the Lewis base. So both of them can be considered conjugate acid-base pairs.