1. Predicting Products in Chemical Reactions

2. Steps to Writing Reactions Some steps for doing reactions 1. 1. Identify the type of reaction 2. 2. Predict the product(s) using the type of reaction as a model 3. 3. Balance it Don’t forget about the diatomic elements! (HI BrONClF) For example, Oxygen is O 2 as an element. In a compound, it can’t be a diatomic element because it’s not an element anymore, it’s a compound!

3. Synthesis Example C + O 2 OO C +  OO C OO C OO C O O C O O C O O C O O C O O C O O C O O C O O C O O C O O C O O C O O C General: A + B  AB

4. Synthesis: Practice Predict the products. Write and balance the following synthesis reaction equations. Sodium + chlorine  Na + Cl 2  Aluminum + fluorine  Al + F 2  Na + & Cl - Na + & Cl - 1 1 NaCl12 2

5. Decomposition Example 2HgO  O Hg O OO + General: AB  A + B

6. Decomposition: Practice Predict the products. Then, write and balance the following decomposition reaction equations: Lead (IV) oxide  PbO 2  Aluminum nitride  AlN  Is either a diatomic molecule? Is either a diatomic molecule? Pb + O 2 1 11

7. Single replacement Example: Zn + CuCl 2  Zn Cl Cu + General: AB + C  AC + B Cl Zn Cu +

8. Practice: Single Replacement Sodium chloride + fluorine  NaCl + F 2  Note that fluorine replaces chlorine in the compound. Aluminum + copper (II) nitrate  Al + Cu(NO 3 ) 2  22 NaF + Cl11 Na + & F - Na + & F - 1 1 Is chlorine a diatomic molecule? Is chlorine a diatomic molecule? 2

9. Double replacement Example: MgO + CaS General:AB + CD  AD + CB S O  Mg Ca + O S Mg Ca +

10. Practice: Double replacement Calcium chloride + sodium phosphate  CaCl 2 + Na 3 PO 4  Lead II nitrate + barium chloride Pb(NO 3 ) 2 + BaCl 2  +Ca 3 (PO 4 ) 2 Ca 2+ & PO 4 3- 3 2 Na + & Cl - 11 NaCl 3 6 21

11. Practice: Combustion C 5 H 12 + O 2  C 10 H 22 + O 2  568 CO 2 + H 2 O Remember products of combustion are always carbon dioxide and water 1

12. Mixed Practice State the type, predict the products, and balance the following reactions: BaCl 2 + H 2 SO 4  C 6 H 12 + O 2  Zn + CuSO 4  Cs + Br 2  FeCl 3 

13. Images Cited http://www.chemistry.ohio- state.edu/betha/nealChemBal/ http://www.chemistry.ohio- state.edu/betha/nealChemBal/ http://www.chemistry.ohio- state.edu/betha/nealChemBal/ http://www.chemistry.ohio- state.edu/betha/nealChemBal/ www.mccsc.edu/~nrapp/chemistrypower point/Student%20Ch%207%20Chemical %20Reactions.ppt www.mccsc.edu/~nrapp/chemistrypower point/Student%20Ch%207%20Chemical %20Reactions.ppt