Good tutorial on the thermodynamic basis of the equilibrium state.

Good, clear comprehensive treatment covering the ins and outs of reaction quotients and equilibrium constants. Recommended.

Discussion of the crucial distinction between the reaction quotient, Q, and the equilibrium constant, K.

How to express reaction quotients and equilibrium constants for different types of reactions.

Problem solving techniques for equilibrium problems. Although the format of the MCAT is not conducive to quantitative problems with multiple steps, want to make sure you understand the problem-solving logic.