2. TYPES OF REACTIONS January 8, 2014

3. the process by which one or more substances are changed into one or more different substances Chemical Reaction

4. REACTANTS the starting substances in a chemical reaction (the stuff on the left)

5. PRODUCTS the final substances in a chemical reaction (the stuff on the right)

6. General Formula for Reactions A + B  C Reactants yield Products

7. two or more substances combine to form one new substance SYNTHESIS A + B  AB Na + Cl 2  NaCl Pb(IV) + O 2  Pb 2 O 4

8. Info on Synthesis Reactions Also known as “combination” reactions Always form compounds Generally give off lots of energy Can be reversed (decomposition)

9. when a substance breaks up into simpler substances DECOMPOSITION AB  A + B NaCl  Na + Cl 2 Pb + O 2 Pb 2 O 4 

10. Info on Decomp Reactions Energy is usually need to make these reactions happen Often are the cause of explosions

11. one element displaces another in a compound SINGLE DISPLACEMENT AB + C  AC + B or CB + A NaBr + Cl 2  NaCl + Br 2 (NH 4 ) 2 S + O 2  (NH 4 ) 2 O + S

12. DOUBLE DISPLACEMENT the positive or negative portions of two compounds are switched AB + CD  AD + CB NaBr + Pb 2 S 3  Na 2 S + PbBr 3 K 2 SO 4 + Ba(OH) 2  KOH + BaSO 4

13. hydrocarbon reacts with oxygen to form carbon dioxide and water COMBUSTION CH 4 + O 2  CO 2 + H 2 O

14. Act These Out!!