Enter the [H3O+] and the [OH-] into the Calculator. The calculator will evaluate the Kw Equation.

## Kw Equation Formula

Kw = [H3O+][OH-]

Variables:

- Kw is the Kw Equation ()
- [H3O+] is the [H3O+]
- [OH-] is the [OH-]

To calculate Kw, multiply the [H3O+] by the [OH-].

## How to Calculate Kw Equation?

The following steps outline how to calculate the Kw Equation.

- First, determine the [H3O+].
- Next, determine the [OH-].
- Next, gather the formula from above = Kw = [H3O+][OH-].
- Finally, calculate the Kw Equation.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

[H3O+] = 1.003×10−7

[OH-] = 1.003×10−7