Question

Consider the rate law below.

R=k[A][B]^2
which step would quadruple the rate?

doubling the concentration of A
doubling the concentration of B
doubling the concentration of both A and B
doubling the concentration of A but halving the concentration of B
@aaronq

Answer 1

R=k[A][B]^2

assume you have [A]=[B]=1

rate= [1][1]^2=1

plug in the changes that they're proposing and observe how the rate changes

Answer 2

True :P

Answer 3

So, A?

Answer 4

what did you get for the rate?

Answer 5

No clue, i was guessing, im lost. haha..

Answer 6

just plug in the values. If the concentraion of A doubles, then you have":

rate= [2][1]^2=2

so the rate doubled but not quadrupled

Answer 7

Oh! I understand what you did now
So it would be C.

Answer 8

I think.

Answer 9

No, it would be B, [1][2]^2 = 4

Answer 10

@aaronq

Answer 11

Yeah, it would be B.

Answer 12

yes it is B