1. Single & Double Displacement Reactions

2. Recall Most chemical reactions fall into the five families of reactions that we will be studying in our course: 1. Synthesis 2. Decomposition 3. Single Displacement 4. Double Displacement 5. Combustion Today we will focus on single and double displacement reactions.

3. Reactivity Series of Metals The single and double displacement reactions are governed by the reactivity series of metals. A higher reactive metal will displace a lower reactive metal but not vice-versa.

4. Single Displacement Reaction Have the skeleton form: Very similar to a dance: B & C are “dancing” together. A asks to cut in, now A & C are “dancing” together. A + BCAC + B

5. Example #1 Given the word equation of the single displacement reaction below, determine the balanced chemical equation. Zinc + Hydrochloric Acid  Zinc Chloride + Hydrogen Gas

6. Solution Zn + HCl H 2 + ZnCl # RAtom# P Zn Cl 11 1 1 2 2 2 2 H 2 1 2 2 2 2

7. Double Displacement Reaction Have the skeleton form: Very similar to “snowball” in a dance: Two couples AB & CD are dancing together. They hear snowball then AD & CB are now dancing together. AB + CDAD + CB

8. Example #2 Given the word equation of the double displacement reaction below, determine the balanced chemical equation. Iron (II) Sulfide + Hydrochloric Acid  Iron (II) Chloride + Hydrogen Sulfide

9. Solution FeS + HCl FeCl 2 + H2SH2S # RAtom# P Fe Cl 11 1 2 2 S 2 1 1 H 1 2 2

10. Homework P.243 #3-5, 7, 8 Single & Double Displacement Worksheet (Web-site)