How to Calculate pH of a Weak Acid Solution

What is the predicted pH of a 0.19 M solution of a weak acid?

Given the Ka of a weak acid is 1.81 x 10⁻⁵, how can we determine the pH of a 0.19 M solution of the weak acid?

The pH of a 0.19 M solution of a weak acid with Ka of 1.81 x 10⁻⁵

The pH of a 0.19 M solution of a weak acid with Ka of 1.81 x 10⁻⁵ can be calculated using a simple formula.

When dealing with weak acids, the Ka value indicates the degree of ionization in the solution. To find the pH of a 0.19 M solution of a weak acid with a Ka of 1.81 x 10⁻⁵, we can use the formula:

pH = -log(square root of (Ka x Molarity))

Substitute the values into the formula:

Now, calculate the pH using the formula:

Therefore, the predicted pH of a 0.19 M solution of a weak acid with a Ka of 1.81 x 10⁻⁵ is 2.73.