Classify each of the following statements as true or false. True/False? Statement The equilibrium constant for the reaction 3A(g) + B(g) = BA3(g) is 2.4E-5. If the initial concentrations of A, B, and BA3 are 0.10M, 0.45M, and 0.71M respectively, the reaction will shift right to achieve equilibrium. If K = 1.0E-8 for the reaction A(g) + 2B(g) = C(g), the products predominate at equilibrium. When a system reaches equilibrium, the rate of the forward reaction equals the rate of the reverse reaction. > >
Classify each of the following statements as true or false. True/False? Statement The equilibrium constant for the reaction 3A(g) + B(g) = BA3(g) is 2.4E-5. If the initial concentrations of A, B, and BA3 are 0.10M, 0.45M, and 0.71M respectively, the reaction will shift right to achieve equilibrium. If K = 1.0E-8 for the reaction A(g) + 2B(g) = C(g), the products predominate at equilibrium. When a system reaches equilibrium, the rate of the forward reaction equals the rate of the reverse reaction. > >
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:### Equilibrium and pH True/False Questions
#### Instructions:
Classify each of the following statements as true or false.
#### Statements and Answer Choices:
1. **Statement:**
The equilibrium constant for the reaction 3A(g) + B(g) ⇌ BA3(g) is 2.4E-5. If the initial concentrations of A, B, and BA3 are 0.10M, 0.45M, and 0.71M respectively, the reaction will shift right to achieve equilibrium.
**Answer Choices:**
- True
- False
2. **Statement:**
If K = 1.0E-8 for the reaction A(g) + 2B(g) ⇌ C(g), the products predominate at equilibrium.
**Answer Choices:**
- True
- False
3. **Statement:**
When a system reaches equilibrium, the rate of the forward reaction equals the rate of the reverse reaction.
**Answer Choices:**
- True
- False
4. **Statement:**
The pH of water at 50°C is 6.63 so it would be considered acidic. (Kw at 50°C is 5.5E-14.)
**Answer Choices:**
- True
- False
5. **Statement:**
For 0.10M monoprotic acids, the larger the value of Ka, the greater the % ionization.
**Answer Choices:**
- True
- False
#### Explanation of Statements:
1. **Equilibrium Constant and Reaction Shift:**
- Understand the relationship between the initial concentrations and the equilibrium constant to predict the direction of the shift.
2. **Equilibrium Constant Value (K):**
- Relate the small value of K to the relative concentration of reactants and products at equilibrium.
3. **Dynamic Equilibrium Concept:**
- Reinforce the principle that at equilibrium, the rates of the forward and reverse reactions are equal.
4. **pH and Kw Relationship:**
- Use the given pH and Kw to determine if water at 50°C is acidic or not relative to the definition of pH.
5. **Acid Ionization and Ka Value:**
- Compare the percent ionization of monoprotic acids based on their Ka values to
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