Problem: Which of the following statements MUST be true if Kc = 1.8 × 10–20A. The reaction favors products at equilibriumB. The reaction favors reactants at equilibriumC. Neither products or reactants are favored at equilibriumD. Kp likely favors productsE. Nothing can be known about Kc without the temperature

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We’re being asked to identify which of the given statements are true if Kc = 1.8x10-20.


The equilibrium constant K is a ratio of products to reactants. It only deals with gaseous or aqueous compounds. 

K >>1 

• forward reaction is highly favored over the reverse reaction
• [reactants] << [products]

K = 1 

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Problem Details

Which of the following statements MUST be true if Kc = 1.8 × 10–20

A. The reaction favors products at equilibrium

B. The reaction favors reactants at equilibrium

C. Neither products or reactants are favored at equilibrium

D. Kp likely favors products

E. Nothing can be known about Kc without the temperature

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