Units of the rate constant?

[spoog74]

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Question 79 in 2011 destroyer it asks for the units;


The concentrations are [A]^2 < ---- This would give us a total 3rd order reaction right? So shouldnt the units be un the M^-2? The answer gives M^-1 ..



Is this a mistake or am i wrong?

 

[herkulease]

can you describe the question more since its gets sorted differently in 2010.

is this the one where you ahve to determine the units or he just gives you the rate law

 

[spoog74]

can you describe the question more since its gets sorted differently in 2010.

is this the one where you ahve to determine the units or he just gives you the rate law

the question asks specifically; " what is the value of the rate constant?"

It gives you a data table of trials. concentration of a, b and rate

you have to determine the units

 

[herkulease]

Ok I know which one. Its #73 on 2010 edition.


it is actually rate = k[a]^2 ^0 or

just rate=k[a]^2

for

I did trial 1/trial 3

you'll get (2/3)^x = 1 x there for can only be 0 for that equation to be valid.

so you get a 2nd order reaction not 3rd order.