Presentation on theme: " Ionic compounds generally are a non-metal with a metal e - spend more time around the more electronegative (polyatomic) ion disproportional sharing."— Presentation transcript:
Ionic compounds generally are a non-metal with a metal e - spend more time around the more electronegative (polyatomic) ion disproportional sharing of electrons causes a ( + ve) charged ion & ( - ve) charge ion The ( + ve) & ( - ve) ions form a lattice (a solid structure)
NaCl (solid) + H 2 O (liquid) NaCl (aqueous) Is there a simpler method to write this? Use symbols
NaCl (s) NaCl (aq) Molecular Equation OR NaCl (s) Na + (aq) + Cl - (aq) Ionic Equation H2OH2O H2OH2O
What Occurs if we mix a solution of ◦ Sodium Chloride AND ◦ Silver Nitrate What do we observe? ◦ The white substance means that a ionic solid has formed that is not dissolved in the water ◦ What is the formula of this solid? What are the two possibilities? (NaCl) ( AgNO 3 )
Molecular Equation: NaCl (aq) + AgNO 3(aq) AgCl (s) + NaNO 3(aq) Ionic Equation: Na + (aq) + Cl - (aq) + Ag + (aq) + NO 3 - (aq) → AgCl (s) + Na + (aq) + NO 3 - (aq) ◦ What ions exist on both sides of the equation? ◦ These can be cancelled out (Known as spectator ions) Net Ionic Equation: Cl - (aq) + Ag + (aq) → AgCl (s) Note: Remember your charges need to be balanced on both sides of the equation!
Why would this solid not dissolve in the water when the ions before were dissolved? The force of attraction between the two ions (Ag + & Cl - ions) are stronger than the force of attraction between the ions and the polar water molecule