Asked by Maya

A second-order reaction has a rate constant of 1.65 M–1 s–1. If the initial reactant concentration is 1.0 M, calculate the time (in seconds) required for the reaction to become 90% complete.


i got 0.06734 seconds but that's incorrect i have no idea what i am doing wrong! HELP!!!!

Answers

Answered by DrBob222
The equation is
[1/(A)] - [1/(Ao)] = kt
Ao = 1
A = 0.1 if it is to be 90% complete.
k is given.
Solve for t.
I plugged in your number for t and apparently you substituted 0.9 for (A) but if it's 90% complete, that means A is 0.1. Try that, see if it doesn't work.
Answered by Anonymous
The way DrBob222 did is correct.
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