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# Order of Reaction Help! :)

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1. Why is the answer D and not A?
And what do they mean "against the square of the concentration of a reactant ..?"
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Why is the answer D and not A?
And what do they mean "against the square of the concentration of a reactant ..?"
hmmmm a very interesting question ...
3. (Original post by charco)
hmmmm a very interesting question ...
So you don;t know the answer?
So you don;t know the answer?
no, I don't know the question!
5. (Original post by charco)
no, I don't know the question!
I'm going to have a guess even though we don't know what's 'in the box'.

The answer is D because the reaction is second order with respect to the reactant in question and therefore is squared in the rate equation.

6. (Original post by TeachChemistry)
I'm going to have a guess even though we don't know what's 'in the box'.

The answer is D because the reaction is second order with respect to the reactant in question and therefore is squared in the rate equation.

I still don't get it.
I still don't get it.
Aha, an image has appeared ...

D is a straight line which shows direct proportionality between rate and the concept on the other axis.

This is only possible if

rate = k x [A]2

or

rate = k[A][ B]
8. (Original post by charco)
Aha, an image has appeared ...

D is a straight line which shows direct proportionality between rate and the concept on the other axis.

This is only possible if

rate = k x [A]2

or

rate = k[A][ B]
Oh, I see!! Thank you!!

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