Question

Short answer

The negative logarithm ofion concentration is used to calculate pH. It's a scale that's used to measure acids and bases.

${\text{pH = - log [H}}_3{\text{O}}^{\text{+}}\text{]}$

Also we know that $\left[{\text{H}}_{\text{3}}{\text{O}}^{\text{+}}\right]=\frac{{\text{K}}_{\text{w}}}{\left[{\text{OH}}^{-}\right]}$

Step-by-step solution

Step-by-Step Solution Step 1: Understanding the concept of pH of an acid base 

The negative logarithm ofion concentration is used to calculate pH. It's a scale that's used to measure acids and bases.

${\text{pH = - log [H}}_3{\text{O}}^{\text{+}}\text{]}$

Also we know that $\left[{\text{H}}_{\text{3}}{\text{O}}^{\text{+}}\right]=\frac{{\text{K}}_{\text{w}}}{\left[{\text{OH}}^{-}\right]}$

Applying the concept and calculation of concentration of hydronium ion.

Applying the concept and calculation of concentration of hydroxide ion.