The reaction A→B has been experimentally determined to be second order. The initial rate is 0.0100M/s at an initial concentration of A of 0.300M. Determine the initial rate at [A]=0.900M.

Question

Julien Willis

Chemistry

22 February, 01:57

The reaction A→B has been experimentally determined to be second order. The initial rate is 0.0100M/s at an initial concentration of A of 0.300M. Determine the initial rate at [A]=0.900M.

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Angela Patton · Answer 1

Let us assume that the reaction is elementary such that the rate law for this is,

R = - k[A]

Substituting the first set of given to determine the value of k,

0.0100 M/s = - k (0.300M)

The value of k is - 1/30s. Substituting the second set,

R = (-1/30s) (0.900M) = 0.03 M/s

Thus, the initial rate is equal to 0.03 M/s.