7th Ed. 7A.15

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7th Ed. 7A.15

Postby daniella_knight1I » Mon Mar 04, 2019 1:45 pm

I'm having difficulty calculating the order for C. I found A and B, but I keep getting weird numbers for C. Can anyone explain how to figure that one out?

Laura Gong 3H
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Re: 7th Ed. 7A.15

Postby Laura Gong 3H » Mon Mar 04, 2019 2:26 pm

So for C, I think you'll find that your work will get you:
1^z/2^z = 1 where z=the order in relation to reactant C.
This just means that z=0 so the reaction is zero order for reactant C.

Hope this helps!

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Re: 7th Ed. 7A.15

Postby taline_n » Mon Mar 04, 2019 2:32 pm

To calculate the order for C, I used experiments 1 and 4. I divided experiment 1 ([A]=10^x, [B]=100^y, [C]=700^z) by experiment 4 ([A]=10^x, [B]=100^y, [C]=400^z). The rates for exp 1/exp 4 are 2/2=1 (so your order for C will have to result in a rate of 1). [A] and [B] cancel out, so you're left with 1=1.75^z. This means that in order for 1.75 to become 1, z=0. C is a zeroth order reaction.

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