Practice What type of reaction is described by the following equation? 6Li + N2  2Li3N 2C8H18(l) + 25 O2(g)  16CO2(g) + 18H2O(l) 2NaCN(aq) + H2SO4(aq)  2HCN(s) + Na2SO4(aq) 2HgO(s)  2 Hg(l) + O2(g) Br2(aq) + NaI(aq)  NaBr(aq) + I2(aq)

Predicting Products Now that you have learned about some of the basic reaction types, you can predict the products of many reactions. The number of elements and/or compounds in the reactants is a good indicator of possible reaction type and thus the possible products.

Practice Predicting Products Predict the products for the following reactions and balance the equations: Al + Cl2  C2H2 + O2  Ag + HCl  MgCl2  CaI2 + Hg(NO3)2  Na2S + Cd(NO3)2 

Net Ionic Equations NOTES #11 Aqueous solutions  It means something is dissolved in water! Example: AgNO3(aq) + NaCl(aq)  AgCl(s) + NaNO3(aq) (aq) means it is dissolved in water. Why is there a solid? (s) It represents that a reaction has occured.

Whenever a solid is formed, we call this a precipitate To show this reaction, we do the NET IONIC EQUATION. Beginning Equation: AgNO3(aq) + NaCl(aq)  AgCl(s) + NaNO3(aq) Complete Ionic Equation: Ag+(aq) + NO3-(aq) + Na+(aq) + Cl-(aq)  AgCl(s) + Na+(aq) + NO3-(aq)

Cancel out spectator ions on each side: Never cancel out the solid. When that happens, you will have your NET IONIC EQUATION It only shows what is important. Ag+(aq) + Cl-(aq)  AgCl(s) A REACTION ONLY OCCURS IN AQUEOUS SOLUTIONS WHEN A PRECIPITATE FORMS.

Practice Give the net ionic equation: Na3PO4(aq) + FeCl3(aq)  How will you know which is the precipitate? Refer to table 11.3 on page 344.