1. Naming and Formula Quiz # 2
1)Ca(ClO3)2 7) Phosphoric Acid 2)Li2SO3 8)Barium Carbonate 3)Li(C2H3O2) 9)Fe3(PO4)2 4)Calcium Sulfate 10)Rubidium Dichromate 5)MnSO4 .5 H2O 6)Copper (I) Perchlorate

2. Chemical Reactions
Chemical reaction, substances join together to form new substances
The original substances present are called REACTANTS
The new substances formed are called PRODUCTS

3. Additional Symbols in Chemical Reactions
+ used to separate reactants or products
(s) means chemical is in solid state
(l) means chemical is in liquid state
(g) means chemical is in gas state
(aq) means aqueous which means the chemical is dissolved in water

4.  means something is added to the reaction Usually this is heat
Other Symbols
 means something is added to the reaction
Usually this is heat
Pt means a catalyst (Pt) is added

5. Skeleton Equations
Skeleton (Formula) Equation- the rough form of an equation
It only shows the framework for the chemical reaction
Example: Fe + Cl2  FeCl3
Question Why is Chlorine written as Cl2?

6. Diatomic Molecules occur in nature
They are shown as single atoms because the molecules formed are more stable than the individual atoms
Diatomic Molecules are Hydrogen, Nitrogen, Oxygen, Fluorine, Chlorine, Bromine, and Iodine
They are written as H2, N2, O2, F2, Cl2, Br2, I2

7. Write Skeleton Equations/Balance Equations
Solid Sodium metal reacts with Oxygen gas to form solid Sodium Oxide
Solid sulfur reacts with Fluorine gas to form gaseous Sulfur Hexafluoride when heated
Nitrogen reacts with Hydrogen to form Ammonia (NH3) gas. Heat is required.

8. Write Skeleton Equations
Solid Magnesium metal reacts with Chlorine gas to form solid Magnesium Chloride.
Aqueous Silver Nitrate reacts with aqueous Sodium Chloride to form solid Silver Chloride and aqueous sodium nitrate

9. Write the Skeleton Formula for the following
Liquid Potassium Permanganate reacts with gaseous Hydrogen Chloride to produce aqueous potassium chloride and aqueous Manganese (II) Chloride and liquid water and chlorine gas.

10. Remember that the diatomic elements (Mr
**Remember that the diatomic elements (Mr. BrINClHOF) appear with a subscript of two when alone

11. Practice
Boron sulfide reacts violently with water to form dissolved boric acid (H3BO3) and hydrogen sulfide gas.
When liquid phosphorus trichloride is added to water, it reacts to form aqueous phosphorous acid (H3PO3) and aqueous hydrochloric acid (HCl).

12. Practice Writing Skeleton Equations
Solid Carbon reacts with Chlorine gas to form solid Carbon Tetrachloride
Solid Magnesium metal reacts with solid Zinc Carbonate to form solid Magnesium Carbonate and solid Zinc metal
Begin 3rd 1/24/01

13. Write and balance the following equations
When Isopropanol Alcohol (C3H8O) is burned in excess oxygen it produces carbon dioxide and water.
When aqueous sodium hydroxide reacts with sulfuric acid (H2SO4), aqueous sodium sulfate and water are produced. 13

14. Write out the Skeleton Equation and balance
Gaseous hydrogen reacts with gaseous chlorine to form aqueous hydrogen chloride
Carbon monoxide gas reacts with gaseous oxygen to form solid carbon dioxide

15. There are five general types of reactions: Synthesis Decomposition
Single Displacement
Double Displacement
Combustion

16. Synthesis reactions are also called combination reactions
A synthesis reaction occurs when two substances combine to form a new compound
Begin 5th

17. Synthesis Reaction Continued
The general form of a synthesis reaction is:
A B  AB
Substance “AB” is the only substance formed
Begin 4th 1/25/02

18. Examples of Synthesis Reactions
2 Mg (s) + O2 (g)  2 MgO (s)
Fe (s) + Cl2 (g)  FeCl2 (s)
U (s) + 3 F2 (g)  UF6 (g)

19. Practice Write the synthesis reaction for the following
The synthesis of KCl
The synthesis of barium fluoride

20. 2) Decomposition Reaction
In decomposition reactions, one substance breaks down (decomposes) into two or more simpler substances
Begin 1st

21. Decomposition Reactions Cont.
General Form of Decomposition Reaction (Binary):
AB  A + B

22. Examples of Decomposition Reactions
2 HgO (s)  2 Hg (l) + O2 (g)
Ca(OH)2  CaO (s) + H2O (g)
H2SO4 (aq)  SO3 (g) + H2O (l)

23. 2. The decomposition of Aluminum Oxide
1. The decomposition of ammonia (NH3)
2. The decomposition of Aluminum Oxide
3. The decomposition Iron (III) Chloride 23

24. Write Correct Balance Equations
The decomposition of magnesium oxide
The decomposition of hydrogen peroxide (H2O2) into oxygen and water
The decomposition of Mg(OH)2 into magnesium oxide and water
The decomposition of NaHCO3
Begin 3rd