Sunday

April 20, 2014

April 20, 2014

Posted by **Mitch** on Saturday, May 1, 2010 at 1:49am.

different reactions denoted R1, R2, and R3.

Tripling the concentration of this reactant in

all three reactions causes the rates of reaction

to increase by factors of 3, 9, and 1, respec-

tively. What is the order of each reaction with

respect to this reactant?

>>> I'm trying to make a guess because I don't understand. My guess is 1, 2, 0.

- Chemistry -
**DrBob222**, Saturday, May 1, 2010 at 12:09pmI think you are correct. For the first one,

R1 = k(A)^{x}but we can ignore k since it will be a constant.

logR1 = x*log(A)

If A is tripled, then R1 is 3R1

log 3 = x*log 3

0.477 = x*0.477 and

x = 1 so that is first order.

If A is tripled, then R1 = 9R1

log 9 = x*log 9

0.954 = x*0.477

x = 0.954/0.477 = 2 or second order.

If A is tripled, then R1 = 1*R1

log 1 = x*log3

0 = x*0.477

x = 0/0.477 = 0 = zero order.

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