Chemistry

Problem

Two aqueous reactions, R1 and R2, occur separately at the same temperature with identical initial reactant concentrations of

0.10\,\text{M}

. R1: rate =

k_1[A]^2[B]

(overall order =

3

) R2: rate =

k_2[A][B]^{0.5}

(overall order =

1.5

) Both reactions involve the same reactants A and B but proceed by different mechanisms. a. Part 1: For each reaction, predict the factor by which the initial rate will change if the concentration of A is doubled while B remains at

0.10\,\text{M}

. Show your calculations. b. Part 2: Compare the sensitivities of R1 and R2 to changes in concentration of A. Explain the chemical significance of the difference. c. Part 3: Under otherwise identical conditions, which reaction would you expect to reach

75\%

completion first? Justify your answer using the overall reaction orders as evidence.

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