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What is the equilibrium constant expression for the reaction: aA + bB β‡Œ cC + dD?

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Question: What is the equilibrium constant expression for the reaction: aA + bB β‡Œ cC + dD?

Options:

  1. K = [C]^c [D]^d / [A]^a [B]^b
  2. K = [A]^a [B]^b / [C]^c [D]^d
  3. K = [C]^c [D]^d
  4. K = [A]^a [B]^b

Correct Answer: K = [C]^c [D]^d / [A]^a [B]^b

Solution:

The equilibrium constant K is defined as the ratio of the concentration of products to the concentration of reactants, each raised to the power of their coefficients in the balanced equation.

What is the equilibrium constant expression for the reaction: aA + bB β‡Œ cC + dD?

Practice Questions

Q1
What is the equilibrium constant expression for the reaction: aA + bB β‡Œ cC + dD?
  1. K = [C]^c [D]^d / [A]^a [B]^b
  2. K = [A]^a [B]^b / [C]^c [D]^d
  3. K = [C]^c [D]^d
  4. K = [A]^a [B]^b

Questions & Step-by-Step Solutions

What is the equilibrium constant expression for the reaction: aA + bB β‡Œ cC + dD?
Correct Answer: K = [C]^c [D]^d / [A]^a [B]^b
  • Step 1: Identify the balanced chemical equation: aA + bB β‡Œ cC + dD.
  • Step 2: Recognize that 'A' and 'B' are reactants, and 'C' and 'D' are products.
  • Step 3: Write the expression for the equilibrium constant K.
  • Step 4: For the products (C and D), write their concentrations raised to the power of their coefficients: [C]^c and [D]^d.
  • Step 5: For the reactants (A and B), write their concentrations raised to the power of their coefficients: [A]^a and [B]^b.
  • Step 6: Combine the products and reactants into the equilibrium constant expression: K = ([C]^c * [D]^d) / ([A]^a * [B]^b).
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