# How to write an equation for buffer reacting with excess base?

• Song
In summary, a buffer is a solution that resists changes in pH by using a weak acid and its conjugate base in equal concentrations. When excess base is added, the buffer reacts by neutralizing the base with its weak acid component, helping to maintain the pH within a certain range. To write an equation for this reaction, the weak acid and its conjugate base must be identified. The equilibrium of a buffer solution is affected by the concentration of the weak acid and conjugate base, pH, temperature, and ionic strength. The equilibrium constant (Ka or Kb) for a buffer solution can be calculated using the Henderson-Hasselbalch equation or through experimental data such as titration or pH measurements.
Song
I have a conjugated acid + excess base (OH-) ---><---...

I don't know how to write the part on the right. Help..
Thanks.

anyone?...

Its just a normal acid base reaction isn't it? or are you talking about the equilibrium set up by the buffer itself?

## 1. What is a buffer?

A buffer is a solution that resists changes in pH when an acid or base is added. It consists of a weak acid and its conjugate base (or vice versa) in roughly equal concentrations.

## 2. How does a buffer react with excess base?

A buffer reacts with excess base by using up the added base through a neutralization reaction with the buffer's weak acid component. This helps to maintain the pH of the solution within a certain range.

## 3. How do I write an equation for buffer reacting with excess base?

To write an equation for buffer reacting with excess base, you need to first identify the weak acid and its conjugate base in the buffer solution. Then, you can write a neutralization reaction between the base and the acid, with the weak acid acting as the acid and the added base acting as the base. For example, if the buffer solution is acetic acid and sodium acetate, the equation would be: CH3COOH + NaOH → CH3COONa + H2O.

## 4. What factors affect the equilibrium of a buffer solution?

The equilibrium of a buffer solution is affected by the concentrations of the weak acid and its conjugate base, as well as the pH of the solution. Temperature and ionic strength may also play a role in some cases.

## 5. How can I calculate the equilibrium constant for a buffer solution?

To calculate the equilibrium constant (Ka or Kb) for a buffer solution, you can use the Henderson-Hasselbalch equation: Ka = [H+][A-] / [HA], where [H+] is the concentration of hydrogen ions, [A-] is the concentration of the conjugate base, and [HA] is the concentration of the weak acid. Alternatively, you can also use experimental data to determine the equilibrium constant through titration or pH measurements.

• Biology and Chemistry Homework Help
Replies
3
Views
568
• Biology and Chemistry Homework Help
Replies
3
Views
2K
• Biology and Chemistry Homework Help
Replies
1
Views
1K
• Biology and Chemistry Homework Help
Replies
5
Views
4K
• Chemistry
Replies
1
Views
1K
• Biology and Chemistry Homework Help
Replies
2
Views
1K
• Biology and Chemistry Homework Help
Replies
1
Views
1K
• Biology and Chemistry Homework Help
Replies
8
Views
3K
• Biology and Chemistry Homework Help
Replies
23
Views
2K
• Biology and Chemistry Homework Help
Replies
7
Views
3K