Question #121122
he rate constant of the reaction is 10.5 x 10*-3 when hcl conc is 0.1 mol. calculate second order rate constant
1
Expert's answer
2020-06-09T07:24:37-0400

The pseudo-1st order rate constant is introduced as the product of the second-order rate constant and the concentration of a reactant, for which the concentration remains quasi-constant during the reaction:

k=k[A]k' = k[A] .

The molar concentration of the reagent A (here HCl) is 0.1 M. Therefore, the second order rate constant is:

k=k[HCl]=10.51030.1=10.5102k = \frac{k'}{[HCl]} = \frac{10.5·10^{-3}}{0.1} = 10.5·10^{-2} s-1 M-1.

Answer: the second order rate constant is 0.105 s-1 M-1.


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