1. Classifying Chemical Reactions EQ – How do chemical reactions satisfy the law of conservation?

2. Synthesis Reactions  Two or more elements or compounds combine to make a more complex substance  A + B  AB  H 2 + O 2  H 2 O 2

3. Decomposition Reactions  Compounds break down into simpler substances  AB  A + B  2H 2 O  H 2 + O 2

4. Single Replacement Reaction  Occurs when one element replaces another one in a compound  Also called Single displacement reaction  AB + C  AC + B  Fe+ HCl  FeCl + H

5. Double Replacement Reaction  Occurs when different atoms in two different compounds trade places  Also called double displacement reaction  AB + CD  AD + CB  KCl + H 2 O  K 2 O 4 + HCl

6. What type of reactions are these? ReactionType Cu + 2AgN 3  CuN 2 + 2Ag FeS + HCl  FeCl 2 + H 2 S 8 Fe + S 8  8 FeS 2 KCl → 2 K + Cl 2 NiCl 2  Ni + Cl 2 Zn + HCl  ZnCl + H 2 Single Replacement Double Replacement Synthesis Decomposition

7. Can you do it all? (BON) 0 1. Iron (III) oxide plus water yields iron (III) hydroxide. 0 2. In a displacement reaction, potassium hydroxide reacts with hydrogen sulfate to produce dihydrogen oxide and what? What has to be done? How will you make certain the Law of Conservation of Mass is followed? What type of reactions are these?

8. Answers: 0 TO DO: Write the equation. Make sure the formulas are correct. Balance the equation. Decide what type of equation it is. 0 Fe 2 O 3 + H 2 O  Fe (OH) 0 KOH + H2SO4 -> K2SO4 + HOH 0 BAL: 2KOH + H 2 SO 4 -> K 2 SO 4 + 2H 2 O 0 BAL: Fe 2 O 3 + 3 H 2 O  2 Fe (OH) 3