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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is concentration and how does it affect reaction rates?
💡 Hint: Think about how many particles are present.
Question 2
Easy
Define activation energy.
💡 Hint: It's what must be overcome for a reaction to happen.
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 happens to reaction rates when the concentration of reactants increases?
- A decrease in reaction rate
- An increase in reaction rate
- No effect on reaction rate
💡 Hint: Think about how many particles are available to collide.
Question 2
True or False: Catalysts are consumed in the chemical reactions they facilitate.
- True
- False
💡 Hint: Consider what catalysts do versus what happens to them.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Given a reaction with activation energy of 50 kJ/mol, calculate the rate constant at 298K, and analyze how increasing temperature by 20K alters the rate constant using the Arrhenius equation.
💡 Hint: Apply k = A exp(-Ea/(RT)) and calculate separately for 298K and 318K to observe the change.
Question 2
A solid reactant's size changes from large chunks to fine powder. Describe how this alters the reaction rate with an example.
💡 Hint: Consider the collisions happening on the surface and how more area contributes to those collisions.
Challenge and get performance evaluation