1. Nadia is studying reversible reactions and dynamic equilibrium. She learns that a catalyst does not affect the position of equilibrium. Why is this?
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Chapter 9: Chemical Equilibrium
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2. Khalid is learning about dynamic equilibrium. He knows that at equilibrium, the forward and reverse reactions continue to occur. What is the net change in concentrations of reactants and products at equilibrium?
3. Chloe is learning about the conditions for equilibrium. She knows that equilibrium can only be reached in a closed system. Why is a closed system necessary for equilibrium?
4. If the equilibrium constant is very small, the reaction favors:
5. 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?
6. Which statement about equilibrium is correct?
7. Ahmed is learning about reversible reactions in his chemistry class. His teacher explains that in a reversible reaction, the products can react to form the original reactants. Which of the following represents a reversible reaction?
8. Chemical equilibrium is important in industry because it:
9. Equilibrium can be disturbed by changing:
10. If the value of equilibrium constant is very large, the reaction favors:
11. Samir is learning about reversible reactions. He understands that in a reversible reaction, the reactants are never completely converted to products. Why is this?
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. Zayn is studying chemical equilibrium. He learns that the equilibrium constant (K) for a reaction is constant at a given temperature. If K is very large, what does it indicate about the reaction?
14. Diana is studying the concept of reversible reactions. She learns that some reactions can be driven to completion by removing products. How does removing a product affect a reversible reaction?
15. Paula is studying the effect of temperature on equilibrium. She knows that for an exothermic reaction, increasing temperature shifts the equilibrium to the left. Why does this happen?
16. Julia is studying chemical equilibrium. She learns that pressure can affect the equilibrium of gaseous reactions. According to Le Chatelier's principle, increasing pressure favors the side with:
17. Which symbol is used to represent a reversible reaction?
18. Julia is studying dynamic equilibrium. She learns that at equilibrium, the reaction has not ceased. Which of the following statements is true at equilibrium?
19. Laura is studying the concept of chemical equilibrium. She understands that equilibrium can be established from either direction. What does this mean?
20. Pure solids are not included in equilibrium expressions because:
21. Samir is learning about reversible reactions. He learns that a reversible reaction reaches equilibrium when the rates of the forward and reverse reactions are equal. What is the effect of increasing the concentration of a reactant on the forward reaction rate?
22. Omar is learning about chemical equilibrium. He understands that equilibrium is a state of balance. Which of the following is NOT a condition for equilibrium?
23. Which condition increases the value of equilibrium constant?
24. Nadia is studying dynamic equilibrium. She understands that at equilibrium, the macroscopic properties are constant. Which of the following is a macroscopic property that would be constant at equilibrium?
25. Rania is studying the conditions for equilibrium. She understands that the system must be closed. What is a characteristic of a closed system?
26. Tina is studying the effect of pressure on equilibrium. She knows that for a reaction with more moles of gas on the reactant side, increasing pressure will shift the equilibrium to:
27. Which reaction is endothermic?
28. According to the law of mass action, the rate of reaction is proportional to:
29. Paula is studying chemical equilibrium. She understands that equilibrium can be affected by changes in concentration, temperature, and pressure. What is the principle that predicts the direction of the shift?
30. The equilibrium constant expression includes: