This document discusses different ways to write equations for ionic reactions in water. It explains that ionic compounds dissociate into their constituent ions in water. When writing the net ionic equation for a reaction between ionic compounds dissolved in water, spectator ions that are common to both sides of the equation and do not participate in the reaction should be crossed out, leaving only the ions that actually react to form products.

1. Net Ionic

2. What are the different ways to write
equations for ionic reactions in water?
• Ionic compounds disassociate in water
Ex: Sodium Chloride and water

3. Demo
• Lead (II) Nitrate and Sodium Iodide solutions
(made by dissolving ionic compounds in water)

4. Pb(NO3)2 (aq) + NaI (aq) PbI2(s) + NaNO3(aq)
• Break it down into its ions to give a complete
net ionic equation
• What is a spectator ion? (cross these out, they
don’t actually “play” in the game)
• What is left?