# Answer to Question #58560 in General Chemistry for daniela

Question #58560

A 0.136 M solution decreases by 0.00193 M in 2.07 s. determine the first order rate constant

Expert's answer

First-order rate constant can be calculated from the equation:

ln A = -kt + ln Ao

ln 0.00193 = -k∙2.07 + ln 0.136

k = - (ln 0.00193 + ln 0.136)/2.07 = 3.98

ln A = -kt + ln Ao

ln 0.00193 = -k∙2.07 + ln 0.136

k = - (ln 0.00193 + ln 0.136)/2.07 = 3.98

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