Homework Help: Chemistry

Posted by Jonah on Friday, February 15, 2013 at 12:34am.

What are the units for rate constant?
I know each may have different units for the k value, I just don't know how to get them. How can I tell just by looking at a given rate law?

Chemistry - DrBob222, Friday, February 15, 2013 at 12:44am
Here is a site that gives them.
http://en.wikipedia.org/wiki/Reaction_rate_constant#Units

Here is how you can do, say zero order and first order. Remember rate of the reaction is measured in M/s.
zero order:
Rate = k = M/s = (moles/L*s)

first order:
Rate = k(A)
k = rate/(A)
k = (M/s)/M = (M/s*M) = 1/s
etc.

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