Question

Equilibrium is established in a reversible reaction when:

Answer 1

is there multiple choice answers or no?

Answer 2

it is when the ratio of concentrations of the reactants and the products is stable

Answer 3

Equilibrium usually occurs when the rate of the forward reaction is equal to the rate of the backward reaction. Hence, the equilibrium will sit in the middle for the system (not favoring either the forward or reverse/backward reaction), with reactants being used to form products and these products immediately forming the original reactants in the reverse reaction again, and we get this continuous cycle.

Answer 4

", the equilibrium will sit in the middle for the system (not favoring either the forward or reverse/backward reaction), "

Not so.

The value of the equilibrium constant, K, determines the relative concentrations of reactants and products when equilibrium has been reached. If K is large, there are more products than reactants at equilibrium. If K is small, the reverse it true. Only when K is approximatly 1 with the concentrations of reactants and products be relatively the same at equilibrium.