The Reaction Quotient Video Lessons

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Problem: Consider the hypothetical reaction below3 A (g) + B (g) ↔ 2 C (g)           Kc = 1.5 x 10-3Which of the following statements is correct if the initial concentrations are [A] = 0.85 M, [B] = 0.36 M, and [C] = 0.005 M.A. At equilibrium, the amount of C will increase.B. At equilibrium, the amount of A will increase.C. At equilibrium, the amount of B will increase and C will increase.D. At equilibrium, the amount of A will increase and B will decrease.E. The reaction is at equilibrium.

FREE Expert Solution
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FREE Expert Solution

We are being asked what would happen to the equilibrium reaction given the initial concentrations of the species. We will use the reaction quotient, Q, to determine if a chemical reaction would be at equilibrium or not. The formula for Q is:

Depending on if Q is greater than or less than K our reaction will shift to attain equilibrium by reaching the equilibrium constant K:

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Problem Details

Consider the hypothetical reaction below
3 A (g) + B (g) ↔ 2 C (g)           Kc = 1.5 x 10-3

Which of the following statements is correct if the initial concentrations are [A] = 0.85 M, [B] = 0.36 M, and [C] = 0.005 M.

A. At equilibrium, the amount of C will increase.

B. At equilibrium, the amount of A will increase.

C. At equilibrium, the amount of B will increase and C will increase.

D. At equilibrium, the amount of A will increase and B will decrease.

E. The reaction is at equilibrium.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the The Reaction Quotient concept. You can view video lessons to learn The Reaction Quotient. Or if you need more The Reaction Quotient practice, you can also practice The Reaction Quotient practice problems.

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Our tutors rated the difficulty ofConsider the hypothetical reaction below3 A (g) + B (g) ↔ 2 ...as medium difficulty.

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