AP Chemistry Unit 7 Vocab

Front

reversible reaction

Back

a reaction where the forward and reverse processes occur simultaneously

Front

forward reaction

Back

The reaction that forms products from reactants.

Front

reverse reaction

Back

The reaction that forms reactants from products.

Front

irreversible reaction

Back

a chemical reaction where products cannot revert back to reactants (such as a strong acid + strong base reaction)

Front

equilibrium

Back

occurs when rates of forward and reverse reactions are equal and no net/observable change occurs; concentration of reactants and products remains constant, though not equal

Front

reaction quotient (Q)

Back

Ratio of [products] to [reactants], at any point during the reaction aside from equilibrium;

Q < K: forward reaction is favored

Q = K: reaction is at equilibrium

Q > K : reverse reaction is favored

Front

equilibrium constant (K)

Back

the ratio of the concentrations of products to reactants at equilibrium, with each concentration raised to the power of its stoichiometric coefficient in the balanced equation

Front

Q vs. K

Back

- Reaction quotient (Q) describes the reaction at any point

- K describes the reaction at equilibrium

Q<K : forward reaction/formation of products is favored

Q > K: reverse reaction/formation of reactants is favored

Q = K : reaction is at equilibrium

Front

K is dependent on

Back

temperature!

Front

If K>1000, then...

Back

indicates reaction has gone to completion