Chapter 6, Problem 6.7P

Interpretation Introduction

Interpretation:

For the given proton transfer reaction, which side of the reaction is favored, and by what numerical factor, is to be predicted.

Concept introduction:

A proton transfer reaction is the one in which a Bronsted Lowry base reacts with a Bronsted Lowry acid to form a conjugate base and a conjugate acid respectively.

A reaction’s tendency to form products is described by its equilibrium constant Keq. A very large Keq favors the products side, while a very small Keq value heavily favors the reactants.

A proton transfer reaction favors the side opposite the stronger acid (i.e., opposite to the lower pKa value). Each difference of one in pKa values between the two acids corresponds to a power of ten by which that side of the reaction is favored.