Buffer Capacity Calculator

Formula

To calculate the Buffer Capacity (B):

\[ B = \frac{n}{pH2 - pH1} \]

Where:

\(B\) is the Buffer Capacity
\(n\) is the Amount of Acid/Base (moles/liter)
\(pH2\) is the Final pH
\(pH1\) is the Initial pH

What is Buffer Capacity?

A buffer capacity is defined as a solution’s ability to resist a change in acidity or pH. It measures how well a solution can maintain its pH when an acid or base is added.

Example Calculation

Let's assume the following values:

Amount of Acid/Base (\(n\)) = 0.1 moles/liter
Initial pH (\(pH1\)) = 4.0
Final pH (\(pH2\)) = 4.5

Using the formula:

\[ B = \frac{0.1}{4.5 - 4.0} = \frac{0.1}{0.5} = 0.2 \text{ moles/liter} \]

The Buffer Capacity is 0.2 moles/liter.