Predict the direction of reaction when H 2 is removed from a mixture (lowering its concentration) in which the following equilibrium has been established: H2(g) + I2(g) ↔ 2HI(g) 11. It is a yellow solid at room temperature. Equilibrium in a chemical reaction is when the rate of the forward reaction is the same as that of the reverse reaction. The AP Chemistry curriculum underwent extensive changes beginning with the 2013-2014 academic year. The last page has Chemistry Notes arranged for a regular High School Chemistry course. The equilibrium of a buffer is the same as the equilibrium of the dissociation of an acid. Ap chem solutions lecture 20 equilibrium iii
