Answer
The forward rate will be faster.
Work Step by Step
Since $HBr$ is a reactant, adding it will cause the reaction to shift right by Le Chatlier's Principle. Thus, the forward rate will be faster.
Chemistry: The Molecular Science (5th Edition)
by Moore, John W.; Stanitski, Conrad L.
Published by
Cengage Learning
ISBN 10:
1285199049
ISBN 13:
978-1-28519-904-7
Chapter 12 - Chemical Equilibrium - Questions for Review and Thought - Topical Questions - Page 563e: 67a
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