At 25deg C, the rate constant for the first-order decomposition of a pesticide solution is 6.4...
At 25deg C, the rate constant for the first-order decomposition of a pesticide solution is 6.4 x 10^-3min^-1. If the starting concentration of the pesticide is 0.0314 M, what concentration will remain after 62.0 min at 25deg C?
Homework Answers
for first order reaction
K = (2.303 / t) log [A0] / [A]
K = 6.4 x 10-3 min-1
t = 62.0 min
[A0] = 0.0314 M
[A] = ?
6.4 x 10-3 = (2.303 / 62) log [0.0314] / [A]
0.172 = - 1.50 - log [A]
log [A] = - 1.672
[A] = 0.0213 M
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