# Calculate the {eq}\left [ OH^- \right ] {/eq} of a {eq}5.5 \times 10^{-3} {/eq} M NaOH solution.

## Question:

Calculate the {eq}\left [ OH^- \right ] {/eq} of a {eq}5.5 \times 10^{-3} {/eq} M NaOH solution.

## Hydroxide Ion:

The hydroxide ion is a type of anion which is formed when molecules of water dissociate into ions. In the hydroxide ion, the molecules of oxygen chemical element and hydrogen chemical elements are combined with the help of one covalent bond. The chemical formula of it is {eq}\text{O}{{\text{H}}^{-}} {/eq}.