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

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

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

 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

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?

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

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.

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

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.

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

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).

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

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

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

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

Synthesis reactions are also called combination reactions A synthesis reaction occurs when two substances combine to form a new compound Begin 5th 1-10-01

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

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)

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

2) Decomposition Reaction In decomposition reactions, one substance breaks down (decomposes) into two or more simpler substances Begin 1st 1-10-01

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

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)

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

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 1-10-2001