Topic 1 - Chemical Equilibrium Flashcards
What is Equilibrium?
a state of a chemical reaction that is reached when the forward and reverse reactions are happening at equal rates
During equilibrium, the rate of _________ = the rate of ___________
Dissolution; precipitation
True or False: The concentrations of reactants and products at equilibrium remain constant
True
K = equilibrium constant
Written as an equation, what is K =?
K = [products] / [reactants]
- concentrations should be raised to the power of the stoichiometry
- pure solid and pure liquid states = 1
When k «_space;1, the concentration of _____ is greater than the concentration of _______.
Reactants; Products
When k»_space; 1, the concentration of _____ is greater than the concentration of _______.
Products; Reactants
If the forward reaction K = x, the reverse reaction K = ?
The reverse reaction K = 1/x
If a new chemical reaction’s stoichiometric coefficients are n times the original reaction’s stoichiometric coefficients, what is the formula to calculate the new K value?
K (new) = K (old) ^ n
When combining 2 reactions together, you ____ the 2 original K values to get the new K value.
multiply
K (new) = K (1) * K (2)
When k = 10^8, which direction is the reaction heading?
Forward, towards the products
When K = 10^-10, which direction is the reaction heading?
Backwards, towards the reactants
K value represents solution concentrations AT equilibrium, while Q value represents solution concentrations ______________.
NOT at equilibrium
Q < K means that the reaction is moving _______ and there is too much of _________.
Forwards; Reactants
Q = K means….
It has reached equilibrium
Q > K means the reaction is moving ________ and there is too much of ________.
Backwards; Products
