1. WELCOME!!
Welcome. Please come in and sit in your seat. Then wait for further instructions.
On your Catalyst sheet you should be on January 21st.

2. CATALYST
5 MINUTES
List the 5 types of chemical reactions and be able to give the basic equations for 4 of the 5.

3. CATALYST
4 MINUTES
List the 5 types of chemical reactions and be able to give the basic equations for 4 of the 5.

4. CATALYST
3 MINUTES
List the 5 types of chemical reactions and be able to give the basic equations for 4 of the 5.

5. CATALYST
2 MINUTES
List the 5 types of chemical reactions and be able to give the basic equations for 4 of the 5.

6. CATALYST
1 MINUTE
List the 5 types of chemical reactions and be able to give the basic equations for 4 of the 5.

7. TIME’S UP!!!!!

8. Answer to Catalyst
List the 5 types of chemical reactions and be able to give the basic equations for 4 of the 5.
Synthesis: AB> A + B
Decomposition: AB > A + B
Single Replacement: AB + C > AC + B
Double Replacement: AB + CD > AD + CB
Combustion

9. AGENDA
Catalyst
Notes-Demos
Exit Ticket

10. ANNOUCEMENTS Quiz Friday
If your name is on the board you may not participate in labs until you’ve taken the test and/or had your contract signed.

11. You’ll identify the types of chemical reactions.
TODAY’S OBJECTIVE
You’ll identify the types of chemical reactions.

12. Chemical Reactions

13. Types of Reactions
There are five types of chemical reactions we will talk about:
Synthesis reactions
Decomposition reactions
Single displacement reactions
Double Displacement reactions
Combustion reactions
You need to be able to identify the type of reaction.

14. 1. Synthesis reactions Analogy –assembling a puzzle
Synthesis reactions occur when two substances (generally elements) combine and form a compound. (Sometimes these are called combination reactions.)
General Format: reactant + reactant  1 product
Basically: A + B  AB
Example: 2H2 + O2  2H2O
Example: C + O2  CO2
Analogy –assembling a puzzle

15. Synthesis Reactions
Here is another example of a synthesis reaction

16. Synthesis Reactions Here is another example of a synthesis reaction
Zn plus sulfur 2 min
Zn + S  _ZnS_____

17. Practice-- Use the bottom of page 1
Predict the product.
Sodium metal reacts with chlorine gas
Na(s) + Cl2(g) 

18. 2. Decomposition Reactions
Decomposition reactions occur when a compound breaks up into the elements or into a few simpler compounds
General Format : 1 Reactant  Product + Product
In general: AB  A + B
Example: 2 H2O  2H2 + O2
Example: 2 KClO3 2KCl + 3O2

19. Decomposition Reactions
Another view of a decomposition reaction:

20. Decomposition Reactions
Another example of a decomposition reaction:
screaming cheeto
Carbohydrate CHO ---- _________+ ______
KClO3

21. 3. Single Replacement Reactions
Single Replacement Reactions occur when one element replaces another in a compound.
A metal can replace a metal (+) OR a nonmetal can replace a nonmetal (-).
General Format : element + compound new element and new compound
A + BC  AC + B (if A is a metal) OR A + BC  BA + C (if A is a nonmetal)

22. Single Replacement Reactions
Another view:

23. Single Replacement Reactions
Zinc metal reacts with aqueous hydrochloric acid
Zn(s) HCl(aq)  ZnCl2 + H2(g)
Note: Zinc replaces the hydrogen ion in the reaction
Sodium chloride solid reacts with fluorine gas
NaCl(s) + F2(g)  NaF(s) + Cl2(g)
Note that fluorine replaces chlorine in the compound 2

24. Single Replacement Reactions
N a reacts with water (HOH)
Na + H2O _H2____ + __Na2O_____
sodium with water in pond :40

25. 4. Double Replacement Reactions
Double Replacement Reactions occur when a metal replaces a metal in a compound and a nonmetal replaces a nonmetal in a compound
General Format : Compound + compound  new compound + new compound
AB + CD  AD + CB

26. Double Replacement Reactions
Think about it like “foil”ing in algebra, first and last ions go together + inside ions go together
Example:
AgNO3(aq) + NaCl(s)  AgCl(s) + NaNO3(aq)
Another example:
K2SO4(aq) + Ba(NO3)2(aq)  KNO3(aq) + BaSO4(s) 2

27. 5. Combustion Reactions (BURNING)
This is also called burning!!! In order to burn something you need the 3 things in the “fire triangle”: 1) A Fuel (hydrocarbon) 2) Oxygen to burn it with 3) Something to ignite the reaction (spark)

28. Combustion Reactions In general: CxHy + O2  CO2 + H2O
Hydrocarbon plus oxygen Products in combustion are ALWAYS carbon dioxide and water. (although incomplete burning does cause some by-products like carbon monoxide)

29. Combustion Reactions
Edgar Allen Poe’s drooping eyes and mouth are potential signs of CO poisoning.

30. Combustion Example: propane burning C3H8 + O2  CO2 + H2O
Demo: methane can explosion
CH4 + __2O2_____  _CO2____ + ___2H2O___ 5 3 4