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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![### Writing the Equilibrium Constant Expression for a Chemical Reaction
In chemical equilibrium, the rate at which reactants convert to products is balanced by the rate at which products convert back to reactants. The equilibrium constant expression, \( K_c \), quantitatively describes this balance for a given reaction.
#### Example Reaction:
\[ \text{CH}_3\text{Cl}(aq) + \text{OH}^-(aq) \rightleftharpoons \text{CH}_3\text{OH}(aq) + \text{Cl}^-(aq) \]
For this reaction:
- **Reactants**:
- \(\text{CH}_3\text{Cl}(aq)\)
- \(\text{OH}^-(aq)\)
- **Products**:
- \(\text{CH}_3\text{OH}(aq)\)
- \(\text{Cl}^-(aq)\)
#### Equilibrium Constant Expression:
The equilibrium constant expression for this reaction is derived from the concentrations of the products and reactants at equilibrium:
\[ K_c = \frac{[\text{CH}_3\text{OH}][\text{Cl}^-]}{[\text{CH}_3\text{Cl}][\text{OH}^-]} \]
Where:
- \([\text{CH}_3\text{OH}]\) is the concentration of methanol.
- \([\text{Cl}^-]\) is the concentration of chloride ion.
- \([\text{CH}_3\text{Cl}]\) is the concentration of methyl chloride.
- \([\text{OH}^-]\) is the concentration of hydroxide ion.
### Interactive Component:
In order to input the equilibrium constant expression, a digital interface is provided with various formatting tools.
#### Diagram Explanation:
- **Input Box**: A blank rectangular box is present for students to type in their equilibrium constant expression.
- **Formatting Tools**: To the right of the input box, there are several icons:
- **Square Root Symbol**: For mathematical operations involving roots.
- **Bracket Tools**: To assist in inserting and formatting chemical concentrations.
- **Reset Button**: To clear the input box.
- **Help Icon**: To provide assistance or hints about writing equilibrium constant expressions.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2b01b03f-a2c7-491c-a9e5-41f2808bd9b0%2Fdb58b430-42a9-44a1-b508-ecf4f96fcc33%2Froh6mkt_processed.png&w=3840&q=75)
Transcribed Image Text:### Writing the Equilibrium Constant Expression for a Chemical Reaction
In chemical equilibrium, the rate at which reactants convert to products is balanced by the rate at which products convert back to reactants. The equilibrium constant expression, \( K_c \), quantitatively describes this balance for a given reaction.
#### Example Reaction:
\[ \text{CH}_3\text{Cl}(aq) + \text{OH}^-(aq) \rightleftharpoons \text{CH}_3\text{OH}(aq) + \text{Cl}^-(aq) \]
For this reaction:
- **Reactants**:
- \(\text{CH}_3\text{Cl}(aq)\)
- \(\text{OH}^-(aq)\)
- **Products**:
- \(\text{CH}_3\text{OH}(aq)\)
- \(\text{Cl}^-(aq)\)
#### Equilibrium Constant Expression:
The equilibrium constant expression for this reaction is derived from the concentrations of the products and reactants at equilibrium:
\[ K_c = \frac{[\text{CH}_3\text{OH}][\text{Cl}^-]}{[\text{CH}_3\text{Cl}][\text{OH}^-]} \]
Where:
- \([\text{CH}_3\text{OH}]\) is the concentration of methanol.
- \([\text{Cl}^-]\) is the concentration of chloride ion.
- \([\text{CH}_3\text{Cl}]\) is the concentration of methyl chloride.
- \([\text{OH}^-]\) is the concentration of hydroxide ion.
### Interactive Component:
In order to input the equilibrium constant expression, a digital interface is provided with various formatting tools.
#### Diagram Explanation:
- **Input Box**: A blank rectangular box is present for students to type in their equilibrium constant expression.
- **Formatting Tools**: To the right of the input box, there are several icons:
- **Square Root Symbol**: For mathematical operations involving roots.
- **Bracket Tools**: To assist in inserting and formatting chemical concentrations.
- **Reset Button**: To clear the input box.
- **Help Icon**: To provide assistance or hints about writing equilibrium constant expressions.
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