Praxis Biology: Chemical Reactions 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. Which of the following indicates a strong acid?

Question 2 2. Suppose you were teaching a science class to middle school students. Because you want to show them an impressive chemical reaction, you decide to dissolve zinc in hydrochloric acid. You add more acid than usual and throw in pieces of zinc. What factor is not going to impact the reaction rate?

Question 3 3. What does an increase in temperature do to the reaction rate?

Question 4 4. A reaction that occurs spontaneously is called what?

Question 5 5. Enthalpy change is

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Question 6 6. If dissolving carbon dioxide in water to form carbonic acid is the forward reaction, what is the reverse reaction that balances this reaction in chemical equilibrium?

Question 7 7. The reason our blood can maintain a relatively neutral pH and keep us from getting sick is _____?

Question 8 8. A _____ pKa indicates a _____ acid.

Question 9 9. Why is a collision between molecules usually necessary for a reaction to take place?

Question 10 10. What does it mean when the enthalpy change for a reaction is negative?

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Question 11 11. The conjugate base is made how?

Question 12 12. How is reaction rate measured?

Question 13 13. An endothermic reaction is:

Question 14 14. When a bond forms, energy is given off to the surroundings. This is an example of

Question 15 15. Which of the following helps blood to be a good buffer?

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Question 16 16. How is increased pressure related to reaction rates?

Question 17 17. An example of an exothermic reaction is:

Question 18 18.

Complete neutralization of KOH with HCl will yield what product(s)?

I. KOH

II. KCl

III. H2O

Praxis Biology: Chemical Reactions 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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