1. Chapter 11 http://sciencespot.net/

2. SYNTHESIS Definition: Two or more elements or compounds combine to make a more complex substance A + B → AB

3. DECOMPOSITION Definition: Compounds break down into simpler substances  + AB → A + B

4. Like a “girlfriend thief” + +  SINGLE REPLACEMENT Definition: Occurs when one element replaces another element in a compound AB + C → AC + B

5. DOUBLE REPLACEMENT Definition: Occurs when different atoms in two different compounds trade places Like “Wife Swap” AB + CD → AC + BD

6. COMBUSTION Definition: Oxygen is a reactant. Oxygen combines with a substance and releases energy. Combusted hydrocarbons produce carbon dioxide and water. 2H 2(g) + O 2(g)  2H 2 O (g) A + O 2 → AC + BD CxHx + O 2 → CO 2 + H 2 O

7. Identifying Chemical Reactions ____ P + O 2 → P 4 O 10 ____ Mg + O 2 → MgO ____ HgO → Hg + O 2 ____ Al 2 O 3 → Al + O 2 ____ Cl 2 + NaBr → NaCl + Br 2 ____ H 2 + N 2 → NH 3 2. Use colored pencils to circle the common atoms or compounds in each equation to help you determine the type of reaction it illustrates. Use the code below to classify each reaction. S = Synthesis D = Decomposition SR = Single Replacement DR = Double ReplacementC = Combustion

8. ____ Na + Br 2 → NaBr ____ CuCl 2 + H 2 S → CuS + HCl ____ HgO + Cl 2 → HgCl + O 2 ____ C + H 2 → CH 4 ____ KClO 3 → KCl + O 2 ____ S 8 + F 2 → SF 6 ____ BaCl 2 + Na 2 SO 4 → NaCl + BaSO 4