Complete ionic equations show aqueous compounds as associated ions. Now remember, in a molecular equation we have our aqueous compounds, but we also possess solids, liquids and gases. When it comes to solid liquids and gases, they themselves never break up into ions. It's only the aqueous compounds.
And remember, we use the solubility rules to determine if something is aqueous or not. Now, when it comes to the complete ionic equation, we're going to say it comes from the molecular equation. And because of that, you're going to have to remember to distribute the coefficient of each compound to determine the correct number of ions.
So as we go into going from the molecular equation to our complete ionic equations, we'll see what that entails.