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Praxis Middle School Science: Chemical Kinetics Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. In the rate law (Rate = k x A), what does the A stand for?

Question 2 2. What is a catalyst?

Question 3 3. What are intermediates?

Question 4 4. What molecule in our bodies is a catalyst?

Question 5 5. Choose the BEST answer that finishes this statement about the collision theory: the speed of chemical reactions is related to:

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Question 6 6. In order for a chemical reaction to take place, what must occur?

Question 7 7.

If you get an equilibrium constant of less than 1 for the chemical reaction below, what does that tell you?

sodium + chlorine --> sodium chloride

Question 8 8. What does Kf/Kr tell you?

Question 9 9. If a chemical reaction has an activation energy of 500 J, and its reactants are assembled with 250 J of energy, what will happen? Why?

Question 10 10. The study of reaction rates with regard to chemical reactions is called:

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Question 11 11. What is the rate-determining step?

Question 12 12. Which of the following statements is true about the reaction rate constants?

Question 13 13. What is an activated complex?

Question 14 14.

For the following reaction, which substance(s) is (are) the reactant(s)?

sodium + chlorine --> sodium chloride

Question 15 15. What is a reaction mechanism?

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Question 16 16. If we know that manganese dioxide is a catalyst in the decomposition of hydrogen peroxide, then how does manganese dioxide affect this reaction?

Question 17 17. When the rate of the forward reaction equals the rate of the reverse reaction, what has occurred?

Question 18 18. If a scientist induces a chemical reaction, and finds that the reactants and products exist in a single phase, then what did the scientist observe?

Question 19 19. Which of the following can impact the reaction rate?

Question 20 20. When two or more reactants combine to form one or more products, what has occurred?

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Question 21 21. Which of the following is true about the collision theory?

Praxis Middle School Science: Chemical Kinetics Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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