Chemical Equations (Involving Ions)

Ions

Charged atoms or molecules

Chemical Formulas of some Common Molecules

• Water - H₂O

• Ammonia - NH₃

• Carbon dioxide - CO₂

• Hydrogen - H₂

• Chloride - Cl₂

• Oxygen - O₂

Chemical formulas of ions made up of groups of atoms

• Ammonium - NH₄⁺

• Hydroxide - OH^-

• Nitrate - NO₃^-

• Carbonate - CO₃^2-

• Sulphate - SO₄^2-

What can you write for any reaction involving ions that happens in solution?

Ionic Equations

What is included in an ionic equation?

Only the reacting particles (and the products they form)

How do you write an ionic equation?

Look at the balanced symbol equation and take out any aqueous ions that are present on both sides