Acid Ionization Constant Calculator

Calculate Acid Ionization Constant (Ka)



Formula

The formula to calculate the Acid Ionization Constant (Ka) is:

\[ K_a = [H^+] \times [A^-] \]

Where:

What is an Acid Ionization Constant?

The acid ionization constant (Ka) is a quantitative measure of the strength of an acid in solution. It is the equilibrium constant for the ionization reaction of the acid in water and is a reflection of the acid’s ability to donate hydrogen ions (H+). A larger Ka value indicates a stronger acid that ionizes more completely in water.

Example Calculation

Let's assume the following values:

Using the formula:

\[ [H^+] = 10^{-3} = 0.001 \text{ mol/L} \]

\[ K_a = [H^+] \times [A^-] = 0.001 \times 0.01 = 0.00001 \]

The Acid Ionization Constant (Ka) is \(1 \times 10^{-5}\).