Practice The Law of Mass Action and the Equilibrium Constant (Kc) - 7.1.2 | Unit 7: Equilibrium | IB Grade 11: Chemistry
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Knowledge

7.1.2 - The Law of Mass Action and the Equilibrium Constant (Kc)

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What is the Law of Mass Action?

💡 Hint: Think about how the concentrations of products and reactants relate to each other at equilibrium.

Question 2

Easy

Describe what Kc represents.

💡 Hint: Remember how 'C' in Kc stands for concentrations.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What does Kc represent in a chemical reaction?

  • The ratio of concentrations at equilibrium
  • The rate of reaction
  • The temperature at which equilibrium is reached

💡 Hint: Think about what Kc stands for.

Question 2

True or False: Kc is always constant regardless of temperature changes.

  • True
  • False

💡 Hint: Consider how temperature influences chemical reactions.

Solve 2 more questions and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

A reaction's rate constant was measured at different temperatures, leading to a Kc of 25 at 300 K. If this reaction is exothermic, predict the Kc values at 350 K. Explain your reasoning.

💡 Hint: Remember how heat influences reaction direction.

Question 2

In a laboratory reaction, an experiment shows that at equilibrium, [A] = 0.3 M, [B] = 0.4 M, and [C] = 0.5 M for the reaction A + B ⇌ C. Calculate Kc for this reaction and interpret its significance.

💡 Hint: Consider how you derive Kc from the equilibrium concentrations.

Challenge and get performance evaluation