Tips for remembering rate laws

[EmilyC_3D]

I was just wondering, does anyone have any tips for remembering the different rate laws and half-lives? I know that they're mostly on the equation sheet, but I was curious to see how other people were remembering which equations goes with which order.

[JonathanM]

So this isn't the best advice ever but the way I remember it is that zero order equations have A_o terms in the numerator if they have them at all, first order equations have natural log terms (just remember that the .693/k equation is actually Ln(2)/k), and second order equations have A_o in the denominator. Also if I ever forget which half life equations are for what order, if you plug in A_o/2 for A and solve for t it gives you the half life equation. Hope this helps!

[Michael Cardenas 3B]

Thank you for this advice!!^

[Katherine_Douglas_1F]

Kinda similar, but the zero-order one is the simplest with just [A] and 0 is (in my mind) the simplest number so that is how I remember that one. I remember the first order because the l in ln[A] is similar to a 1 as in the first order. And then the 1/[A] is just the second order by process of elimination. Another way to do it is to just remember the order on the equation sheet (1,2,0).