What is the equation for the equilibrium constant (Kc) for the following reversible reaction?

aA + bB â‡Œ cC + dD

Kc ​=[A]a[B]b[C]c[D]d​

Answer in your head, out loud, or on paper, then tap the card to flip.

What do square brackets represent in the Kc equation?

Concentration of

Answer in your head, out loud, or on paper, then tap the card to flip.

What does a Kc value of 1 indicate?

A Kc value of 1 indicates that the reaction is at equilibrium, and the concentrations of reactants and products are equal when raised to their respective stoichiometric coefficients.

Answer in your head, out loud, or on paper, then tap the card to flip.

What does a Kc value greater than 1 indicate about the position of equilibrium?

A position of equilibrium that lies towards the products.

Answer in your head, out loud, or on paper, then tap the card to flip.

What does a Kc value less than 1 indicate about the position of equilibrium?

A position of equilibrium that lies towards the reactants.

Answer in your head, out loud, or on paper, then tap the card to flip.

What are the units of Kc?

The units of Kc vary depending on the number of concentration terms in the Kc equation.

Answer in your head, out loud, or on paper, then tap the card to flip.

How does increasing the temperature affect the value of Kc if the forward reaction is endothermic?

Kc increases

Answer in your head, out loud, or on paper, then tap the card to flip.

What is the effect of changing concentration on the value of Kc?

The value of Kc remains unchanged by chages in concentration.


The value of Kc is only altered by changes in temperature.

Answer in your head, out loud, or on paper, then tap the card to flip.

What can the size of the equilibrium constant, Kc, tell us about the composition of the equilibrium mixture?

If Kc is much greater than 1, products predominate.

If Kc is much less than 1, reactants predominate.

Answer in your head, out loud, or on paper, then tap the card to flip.

What is the effect of a catalyst on the value of Kc and the position of equilibrium?

Catalysts have no effect on the value of Kc or the position of equilibrium.

Answer in your head, out loud, or on paper, then tap the card to flip.

How does decreasing the temperature affect the value of Kc if the forward reaction is endothermic?

Kc decreases

Answer in your head, out loud, or on paper, then tap the card to flip.

How does decreasing the temperature affect the value of Kc if the forward reaction is exothermic?

Kc increases

Answer in your head, out loud, or on paper, then tap the card to flip.

How does increasing the temperature affect the value of Kc if the forward reaction is exothermic?

Kc decreases

Answer in your head, out loud, or on paper, then tap the card to flip.