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Pyridine (C \(5 \mathrm{H}_{5} \mathrm{~N}\) ) acts as a Brønsted-Lowry base in water. Write the hydrolysis reaction for pyridine and identify the Brønsted- Lowry acid and Brønsted-Lowry base.

Short Answer

Expert verified
Pyridine acts as a Brønsted-Lowry base and water as a Brønsted-Lowry acid in the hydrolysis reaction.

Step by step solution

01

Understand the Components

Pyridine (\( \text{C}_5\text{H}_5\text{N} \)) is functioning as a Brønsted-Lowry base in this reaction. Water (\( \text{H}_2\text{O} \)) is the solvent, which can act as a Brønsted-Lowry acid or base depending on the reaction it is involved in.
02

Determine the Reaction

In the hydrolysis of pyridine, it accepts a proton (\( \text{H}^+ \)) from water. The reaction is: \[ \text{C}_5\text{H}_5\text{N} + \text{H}_2\text{O} \rightleftharpoons \text{C}_5\text{H}_5\text{NH}^+ + \text{OH}^- \]
03

Identify the Brønsted-Lowry Acid

In this reaction, water (\( \text{H}_2\text{O} \)) donates a proton to pyridine, forming \( \text{OH}^- \). Hence, water acts as the Brønsted-Lowry acid.
04

Identify the Brønsted-Lowry Base

Pyridine (\( \text{C}_5\text{H}_5\text{N} \)) accepts a proton to become \( \text{C}_5\text{H}_5\text{NH}^+ \), thus it acts as the Brønsted-Lowry base in this reaction.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Pyridine Hydrolysis
When discussing the topic of pyridine hydrolysis, we're talking about a specific type of chemical reaction. Hydrolysis is the process where a compound reacts with water, often breaking down into simpler substances. In the case of pyridine (C\( _5 \)H\( _5 \)N), which is a basic organic compound, the hydrolysis process involves accepting a proton (H\( ^+ \)) from water (H\( _2 \)O).

This results in a proton transfer and creates a positively charged pyridinium ion (C\( _5 \)H\( _5 \)NH\( ^+ \)) along with a hydroxide ion (OH\( ^- \)). The balanced equation for this hydrolysis reaction is:

\[ \text{C}_5\text{H}_5\text{N} + \text{H}_2\text{O} \rightleftharpoons \text{C}_5\text{H}_5\text{NH}^+ + \text{OH}^- \]

In this equation, you see the transformation of pyridine after it accepts a proton from water, illustrating the nature of chemical changes during hydrolysis.
Brønsted-Lowry Acid
The concept of a Brønsted-Lowry acid revolves around the ability to donate a proton. In the context of pyridine hydrolysis, water acts as a Brønsted-Lowry acid. Here's why:

- During the reaction, water (H\( _2 \)O) donates a proton (H\( ^+ \)) to pyridine, resulting in the formation of a hydroxide ion (OH\( ^- \)).
- This action of losing a proton is what defines water as the acid in the Brønsted-Lowry framework.

It's interesting to see that water can play dual roles in chemical processes, acting as an acid in some situations and a base in others. This flexibility makes water an important participant in many chemical reactions.
Proton Transfer Reaction
Proton transfer reactions are fundamental in Brønsted-Lowry acid-base chemistry. This type of reaction involves the movement of a proton from an acid to a base. In the case of the pyridine hydrolysis reaction, this is what happens:

- Pyridine (C\( _5 \)H\( _5 \)N) acts as a Brønsted-Lowry base, and it accepts a proton from water.
- As a result, the proton transfer creates a pyridinium ion (C\( _5 \)H\( _5 \)NH\( ^+ \)) and a hydroxide ion (OH\( ^- \)).

This transfer is crucial because it highlights the roles of pyridine as a base and water as an acid, aligning perfectly with the Brønsted-Lowry definitions. Understanding the dynamics of proton transfer can help in grasping how substances interact in chemical reactions, providing a clearer picture of molecular transformations.

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