Net ionic equation

Definition

A net ionic equation shows only the chemical species that are involved in a reaction, omitting the spectator ions. It simplifies reactions by highlighting the actual changes occurring.

5 Must Know Facts For Your Next Test

1. Net ionic equations focus on the substances that change state or composition during the reaction.
2. Spectator ions, which do not participate in the reaction, are omitted from net ionic equations.
3. To write a net ionic equation, start with a balanced molecular equation and then separate strong electrolytes into their ions.
4. The charges and number of atoms must balance on both sides of the net ionic equation.
5. Net ionic equations are particularly useful for reactions in aqueous solutions where many compounds dissociate into ions.

Review Questions

• What is omitted from a net ionic equation?
• Why are net ionic equations useful for reactions in aqueous solutions?
• How do you derive a net ionic equation from a molecular equation?

Related terms

Spectator Ion: An ion that does not undergo any chemical change during a reaction and is not included in the net ionic equation.

Molecular Equation: A chemical equation that shows all reactants and products as compounds without indicating their ionic nature.

Ionic Equation: $$\text{A chemical equation that shows all strong electrolytes dissociated into their constituent ions.}$$