Total Ionic Equation
Definition and meaning of Total Ionic Equation in chemistry.
A total ionic equation shows all the dissolved particles in a chemical reaction. It writes every strong dissolved chemical as separate floating ions. This gives a much more realistic picture of what actually happens in the beaker.
In more detail
Many solid salts and strong acids dissolve completely when you put them in water. They break apart into positive and negative ions that float around freely. A standard chemical equation writes these dissolved chemicals as if they are stuck together.
The total ionic equation splits them apart to show the true liquid environment. You write the exact charge and state symbol for every single dissolved piece. Some of these floating ions actually crash together to form a new solid.
Chemists call this newly formed solid chemical product a precipitate. Other ions just float around and watch the reaction happen without doing anything. Chemists playfully call these unreacting particles spectator ions because they just watch.
You must include all of these spectator ions in a total ionic equation. A common student mistake is forgetting to multiply the ions by the balancing coefficients. If you have two molecules of salt, you must draw two separate sodium ions. You also need to write out two separate chloride ions in the equation.
Key facts
| Field | General Chemistry |
|---|---|
| Main Purpose | Shows true state of dissolved ions |
| Included parts | Both reacting ions and spectator ions |
| Required formatting | Charges and state symbols for every ion |
| Next step | Remove spectators to find net ionic equation |
Let us mix aqueous sodium chloride with aqueous silver nitrate in a beaker. Both of these clear liquids are full of separated floating ions. The total ionic equation is Na+ (aq) + Cl- (aq) + Ag+ (aq) + NO3- (aq) -> AgCl (s) + Na+ (aq) + NO3- (aq). The silver and chloride ions find each other and firmly stick together. They form a white solid called silver chloride that falls to the bottom. The sodium and nitrate ions just keep floating in the water as spectator ions.
Frequently asked questions
What is the difference between a total ionic equation and a net ionic equation?
A total ionic equation includes every single ion in the beaker. A net ionic equation removes the spectator ions and only shows the chemicals that actually react.
What is a spectator ion?
A spectator ion is a dissolved particle that does not take part in the chemical reaction. It floats in the water before the reaction and floats in the water after.
Do weak acids split apart in a total ionic equation?
No, weak acids only separate a tiny bit in water. You must write weak acids as whole molecules in your total ionic equation.