A solution is prepared that is initially 0.49M in pyridine (C5H₂N), a weak base, and 0.40M in pyridinium chloride (C5H5NHC1). Complete the reaction table below, so that you could use it to calculate the pH of this solution. Use x to stand for the unknown change in OH. You can leave out the M symbol for molarity. [C,H.N] [C₂H₂NH*] [OH-] initial 00 0 change 0 0 final 0 0 0 0 00

Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter15: Solutions Of Acids And Bases
Section: Chapter Questions
Problem 15.91QE
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## Reaction Table Preparation for pH Calculation of Pyridine Solution

### Problem Statement
A solution is prepared that is initially 0.49 M in pyridine (C₅H₅N), a weak base, and 0.40 M in pyridinium chloride (C₅H₅NHCl). Complete the reaction table below, so that you could use it to calculate the pH of this solution.

Use \( x \) to stand for the unknown change in \( \left[ \text{OH}^- \right] \). You can leave out the \( M \) symbol for molarity.

### Reaction Table

|                       | [C₅H₅N] | [C₅H₅NH⁺] | [OH⁻] |
|:---------------------:|:-------:|:---------:|:-----:|
| **Initial**           | 0.49    | 0.40      | 0     |
| **Change**            | -x      | +x        | +x    |
| **Final**             | 0.49 - x| 0.40 + x  | x     |

This table represents the concentrations of pyridine (\( \text{C}_5\text{H}_5\text{N} \)), pyridinium ion (\( \text{C}_5\text{H}_5\text{NH}^+ \)), and hydroxide ion (\( \text{OH}^- \)) as they change throughout the reaction. Initially, there are 0.49 M of pyridine and 0.40 M of pyridinium ion, with no hydroxide ions present. As the reaction proceeds, the concentrations change by \( x \), resulting in final concentrations of \( 0.49 - x \) for pyridine, \( 0.40 + x \) for pyridinium ion, and \( x \) for hydroxide ions.

This table will aid in calculating the equilibrium concentrations of the species involved, which can then be used to determine the pH of the solution.
Transcribed Image Text:## Reaction Table Preparation for pH Calculation of Pyridine Solution ### Problem Statement A solution is prepared that is initially 0.49 M in pyridine (C₅H₅N), a weak base, and 0.40 M in pyridinium chloride (C₅H₅NHCl). Complete the reaction table below, so that you could use it to calculate the pH of this solution. Use \( x \) to stand for the unknown change in \( \left[ \text{OH}^- \right] \). You can leave out the \( M \) symbol for molarity. ### Reaction Table | | [C₅H₅N] | [C₅H₅NH⁺] | [OH⁻] | |:---------------------:|:-------:|:---------:|:-----:| | **Initial** | 0.49 | 0.40 | 0 | | **Change** | -x | +x | +x | | **Final** | 0.49 - x| 0.40 + x | x | This table represents the concentrations of pyridine (\( \text{C}_5\text{H}_5\text{N} \)), pyridinium ion (\( \text{C}_5\text{H}_5\text{NH}^+ \)), and hydroxide ion (\( \text{OH}^- \)) as they change throughout the reaction. Initially, there are 0.49 M of pyridine and 0.40 M of pyridinium ion, with no hydroxide ions present. As the reaction proceeds, the concentrations change by \( x \), resulting in final concentrations of \( 0.49 - x \) for pyridine, \( 0.40 + x \) for pyridinium ion, and \( x \) for hydroxide ions. This table will aid in calculating the equilibrium concentrations of the species involved, which can then be used to determine the pH of the solution.
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