Acid Dissociation Constant (Ka) Calculator

Formula

To calculate the Acid Dissociation Constant (Ka):

\[ Ka = \frac{A \times H}{HA} \]

Where:

\( Ka \) is the Acid Dissociation Constant
\( A \) is the concentration of conjugate base of acid (M)
\( H \) is the concentration of hydrogen ions (M)
\( HA \) is the concentration of chemical species (HA) (M)

What is the Acid Dissociation Constant?

The Acid Dissociation Constant, \( Ka \), is a quantitative measure of the strength of an acid in solution. It is the equilibrium constant for the dissociation of an acid into its conjugate base and a hydrogen ion. The higher the value of \( Ka \), the stronger the acid.

Example Calculation

Let's assume the following values:

Concentration of Conjugate Base \( A \) = 0.1 M
Concentration of Hydrogen Ions \( H \) = 0.01 M
Concentration of Chemical Species \( HA \) = 0.1 M

Step 1: Multiply the concentration of the conjugate base by the concentration of hydrogen ions:

\[ A \times H = 0.1 \times 0.01 = 0.001 \]

Step 2: Divide the result by the concentration of the chemical species:

\[ Ka = \frac{0.001}{0.1} = 0.01 \]

The Acid Dissociation Constant \( Ka \) is 0.01.