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Unformatted text preview: Fundamentals: I Aqueous Solutions and Precipitation Precipitation reactions An insoluble solid forms when two strong electrolytes (in solution) are mixed electrolyte solute present in an aqueous solution almost entirely as ions Complete ionic equation All the ions and solids are shown (even if the ions remain ions after the reaction) Net ionic equation Spectator ions are not shown only the players in the chemical reaction Ex. Write the complete and net ionic equations for: Pb(NO 3 ) 2 (aq) + HCl (aq) PbCl 2 (s) + HNO 3 (aq) 1) Balance equation: Pb(NO 3 ) 2 (aq) + 2 HCl (aq) PbCl 2 (s) + 2 HNO 3 (aq) 2) Write the complete ionic equation Write (aq) compounds as ions because they are really dissolved: Include correct charge and stochiometric coefficient Pb 2+ (aq) + 2 NO 3- (aq) + 2 H + (aq) + 2 Cl- (aq) PbCl 2 (s) + 2 H + (aq) + 2 NO 3- (aq) 3) Write the net ionic equation: Cancel out the spectator ions (like terms) If it changed in the reaction leave it in the net ionic equation Pb 2+ (aq) + 2 NO 3- (aq) + 2 H + (aq) + 2 Cl- (aq) PbCl 2 (s) + 2 H + (aq) + 2 NO 3- (aq) Pb 2+ (aq) + 2 Cl- (aq) PbCl 2 (s) Predicting the products of a precipitation reaction Solubility rules! page F65 Ex. Determine the total & net ionic equation resulting from the reaction of solutions of sodium sulfate and barium bromide:...
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This note was uploaded on 04/24/2008 for the course CHEM 6A taught by Professor Pomeroy during the Winter '08 term at UCSD.
- Winter '08