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Equilibrium is established in a reversible reaction when:

a) the [product] = [reactants]

b) rate of reaction of products = rate of reaction of reactants

c) all the reactants dissolve or dissociate

d) when product are no longer produced

Respuesta :

Erudite1
The correct option is A.
A reversible reaction is one in which the reactants form a products, which can react back to form the reactants. Thus, a reversible reaction can proceed in both directions; forward and backward. Equilibrium is said to be attained when the rate of forward reaction equal the rate of backward reaction. All the reactants and products concentrations are constant at equilibrium.

Answer: The correct answer is Option b.

Explanation:

A chemical reaction is said to be in equilibrium when the concentration of products and reactants are constant or their ratio does not vary.

It can also be defined when the rate of forward reaction is equal to the rate of backward reaction.

The equilibrium constant is written as [tex]K_{eq}[/tex]. The expression for this for general reaction is:

[tex]aA+bB\rightarrow cC+dD[/tex]

Expression for [tex]K_{eq}[/tex] follows:

[tex]K_{eq}=\frac{[C]^c[D]^d}{[A]^a[B]^b}[/tex]

There are 3 conditions:

  • If [tex]K_{eq}>1[/tex], the reaction is proceed in the forward direction.
  • If [tex]K_{eq}<1[/tex], the reaction is proceed in the backward direction.
  • If [tex]K_{eq}=1[/tex], the reaction is in equilibrium.

Hence, the correct answer is Option b.

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