Keq, Isp, Q, etc.

[ramzax]

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in overviewing for the MCAT i've noticed some of these rate laws work out in two ways

in the first case such as [A]^2

plugging in values for A also means adding a 2 next to it's concentration.

in other cases it doesn't. i forgot which cases those are though. can anyone help clarify it for me?

 

[kwikemartman]

Keq should be taken to the exponent of the coefficient only

but if you're solving for an unknown solubility you use the molar coeffiecient as both.

ie

XY--> X+ 2Y

would be

K= (x)(2x)^2

 

[ramzax]

can anyone further clarify this for me?