1. T HE D IFFERENT T YPES OF ___________________ ___________________

2. T HE D IFFERENT T YPES OF C HEMICAL R EACTIONS

3. T ODAY ’ S T ARGETS :  To be able to describe and identify 6 different types of Chemical Reactions

4. WHY DO WE CARE ABOUT CLASSIFYING TYPES OF CHEMICAL EQUATIONS??? It is human nature to want to classify things. We classify music, food and... o Classifying allows us to PREDICT what will happen before the reaction occurs!

5. H OW DO W E C LASSIFY TYPES OF R EACTIONS ? Based on how the atoms become rearranged during the reaction.

6. C LASSIFYING REACTIONS BASED ON ATOM REARRANGEMENT Remember: REACTANTS are what we start with and PRODUCTS are what we end with 2H 2 + O 2  2H 2 O

7. T YPE 1- SYNTHESIS, COMBINATION OR ADDITION Description 2 or more reactants combine to make 1 single product General Equation A+ B  AB Specific Example 2H 2 + O 2  2H 2 O Analogy boy meets girl = couple Picture

8. T YPE 2- DECOMPOSITION OR BREAKING APART Description 1 Single reactant is broken down into 2 or more products General Equation A B  A+ B Specific Example 2H 2 O  2H 2 + O 2 Analogy The couple Breaks up! Picture

9. T YPE 3- SINGLE REPLACEMENT OR SUBSTITUTION Description 1 single element replaces an element in a compound General Equation A + BC  AC+ B Specific Example Ca + MgCl 2  CaCl 2 + Mg Analogy Like one girl switching dance partners Picture

10. T YPE 4- DOUBLE REPLACEMENT Description When elements in 2 different compounds switch or change places General Equation AB + CD  AD+ CB Specific Example NaCl + KI  NaI + KCl Analogy Like 2 pairs or sets of dancers changing partners Picture

11. Double replacement reactions produce a precipitate. This is an insoluble solid (it doesn’t dissolve) that usually sinks to the bottom of the solution.

12. T YPE 5- NEUTRALIZATION Description Acid + Base  Salt + Water General Equation HA + BOH  BA+ H 2 0 Specific Example HCl + NaOH  NaCl + H 2 O Hint Will always have OH on reactant (left) side and H 2 0 on product (right) side

13. T YPE 6- COMBUSTION OR BURNING Description Hydrocarbon reacts with Oxygen (O 2 ) to produce Heat, Carbon Dioxide (CO 2 ) and Water (H 2 O) General Equation C x H y + O 2  CO 2 + H 2 0 Specific Example CH 4 + O 2  CO 2 + H 2 0 Hint Will always have CO 2 + H 2 0 on product (right) side (methane)

14. R EVIEW Atom rearrangement 1) Synthesis (Combination) 2) Decomposition 3) Single Replacement (Substitution) 4) Double Replacement 5) Neutralization 6) Combustion ( Burning)

15. LAST NOTE: Classifying chemical reactions is all about PATTERNS!!!