Chapter 9: Chemical Equilibrium + Chapter 10: Acids, Bases and Salts

2. Fatima is studying the conditions for equilibrium. She understands that for a reaction to be at equilibrium, the forward and reverse reactions must have the same rate. What happens to the concentrations of reactants and products when the rates are equal?

3. Hina is studying chemical equilibrium. She learns that the equilibrium constant (K) is temperature-dependent. What happens to K for an exothermic reaction when the temperature is decreased?

4. Sam is learning about the characteristic properties of acids. He knows that acids react with carbonates to produce carbon dioxide gas. What happens when hydrochloric acid reacts with calcium carbonate?

5. Fatima is studying the concept of dynamic equilibrium. She learns that at equilibrium, the macroscopic properties of the system are constant. Which of the following is a macroscopic property that remains constant at equilibrium?

6. David is studying the Arrhenius concept. He knows that an acid produces H+ ions in water. Which of the following is an acid according to Arrhenius?

7. Usman is learning about dynamic equilibrium. He understands that at equilibrium, the rates of the forward and reverse reactions are equal. What does this imply about the concentrations of reactants and products?

8. Carlos is learning about chemical equilibrium. He understands that the equilibrium constant (K) depends on temperature. If the temperature of an exothermic reaction is increased, what happens to the value of K?

9. A reversible reaction is one that:

10. According to Arrhenius, a base produces which ion in water?

11. Which statement about equilibrium is correct?

12. Ibrahim is learning about reversible reactions. He understands that the reaction: N2 + 3H2 ⇌ 2NH3 is reversible. What happens if the pressure is increased on this system?

13. Fatima is studying strong and weak bases. She knows that strong bases completely dissociate in water. Which of the following is a strong base?

14. Uma is studying strong and weak acids. She knows that strong acids are better conductors of electricity than weak acids. Which of the following is a strong acid?

15. Hina is studying reversible reactions. She learns that not all reactions are reversible. Which of the following is an example of a reaction that is reversible?

16. A solution with pH greater than 7 is:

17. Chemical equilibrium is important in industry because it:

18. Xia is studying the conditions for equilibrium. She learns that equilibrium is a dynamic process. Which of the following is an example of a system at dynamic equilibrium?

19. Le Chatelier’s principle explains the effect of:

20. Zara is studying the characteristic properties of acids. She knows that acids have a sour taste and turn blue litmus red. What is the pH of a typical acid solution?

21. Ibrahim is studying the properties of bases. He knows that bases react with acids to form salts and water. What is this reaction called?

22. Waseem is learning about oxides. He knows that oxides can be acidic, basic, amphoteric, or neutral. Which of the following is an example of a neutral oxide?

23. Equilibrium can be disturbed by changing:

24. Tina is learning about the concept of acids and bases. She knows that according to the Bronsted-Lowry concept, an acid is a proton donor. Which of the following is an acid in the reaction: H2O + CO3^2- → HCO3- + OH-?

25. Nora is learning about hydroxides. She knows that hydroxides are compounds that contain the OH- ion. Which of the following is a hydroxide?

26. Tina is studying the properties of bases. She knows that bases react with ammonium salts to release ammonia gas. What gas is released when sodium hydroxide reacts with ammonium chloride?

27. Which condition is necessary for equilibrium to be established?

28. Chemical equilibrium is achieved when:

29. According to Le Chatelier’s principle, if stress is applied:

30. Which base is also known as caustic soda?