GC Kinetics Question

[flyingforever]

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A + B --> C

Based on the following experimental data, what is the rate law for the hypothetical reaction given above?

Experiment [A] Initial Rate of formation of C
1 0.20 0.10 2.0x 10^-6
2 0.20 0.20 4.0x 10 ^-6
3 0.40 0.40 1.6 x 10^-5

I am having trouble understanding this question. I can find the rate reaction with respect to B, but don't know what to do with A.

 

[Jia7]

well if you figured out the rate with respect to B, just plug in the value for that and you can find A.

So if you found the exponent of B by dividing eq 1 by 2. Then use that same exponent when dividing eq 1 or 2 by 3 and then figure out the exponent for A.

I think the answer should be, k[A]

 

[Troyvdg]

well if you figured out the rate with respect to B, just plug in the value for that and you can find A.

So if you found the exponent of B by dividing eq 1 by 2. Then use that same exponent when dividing eq 1 or 2 by 3 and then figure out the exponent for A.

I think the answer should be, k[A]

agreed, rate law is rate = k[A]

 

[DQLEUCD]

A + B --> C

Based on the following experimental data, what is the rate law for the hypothetical reaction given above?

Experiment [A] Initial Rate of formation of C
1 0.20 0.10 2.0x 10^-6
2 0.20 0.20 4.0x 10 ^-6
3 0.40 0.40 1.6 x 10^-5

I am having trouble understanding this question. I can find the rate reaction with respect to B, but don't know what to do with A.

Since you know the rate law of B, you have to factor that into the equation. So when you double B, the initial rate should be doubled by B. You divide that by 2 and you have the initial rate due to A and you solve. So taking example 2 and 3.

.4 x 10^-5 increased to 1.6 x 10^-5. The whole rate went up by 4. If you divide by 2 to account for B you get the rate went up by 2 when you double A's concentration.

rate law = k [A]