BONDING: LEWIS DOT LAB ACTIVITY

• Go over homework 7-1 on balancing equations
• DEMONSTRATION: Magic Sponge (Acids and Bases general equation)
• Sixth type of Chemical Reaction
• Reaction types Rxn Types Notes: Teach reaction types using people models 5
• DEMONSTRATION: DYNAMITE SOAP:  HYDROGEN + OXYGEN --> WATER

Homework:  Catagories of Chemical Rxns & 6 Types of Chemical Rxns Worksheet (2 SIDED) Due Friday

FRIDAY 1/31

Illinois Standards: 12C, 12.11.57
OPENER: Name Rxn type
& balance equation

Check and go over homework

Write -up all demonstrations:

Demonstrations:

Water is decomposed by electrolysis to produce hydrogen and oxygen gas

1. Decomposition: Water Electrolysis Apparatus. Electricity is used to decompose owater into oxygen gas at one electrode and hydrogen gas at the other electrode. H test  Reverse reaction: a burning splint added to the gas makes a popping sound.  The oxygen is tested with a glowing splint that bursts into flame. 
   CONCEPT: A decomposition reaction begins with one reactant which is a compound and ends with more than one product (usually elements) WRITE AND BALANCE THE EQUATION FOR THIS REACTION.  H2O -->H2  + O2
2. Synthesis: [powdered Zn & solid I added to a dish. (A few drops of water is added as a catalyst] This bursts with a puff of purple smoke ( The excess iodine gas sublimates.)
   A synthesis reaction begins with 2 or more elements and produces 1 compound. Sometimes a catalyst is used.WRITE AND BALANCE THE EQUATION FOR THIS REACTION. Zn + I2 ->  ZnI 2
   
3. Combustion:Whoosh Bottle; A small amount of methanol is added to different sized bottles, When lighted it bursts into a 'whoosh' flame.   Methanol, milk bottle explosion or 10gal jug  bottle:
   In a combustion reaction, oxygen is always one of the reactants. For complete combustion of a hydrocarbon (compound consisting of hydrogen and carbon), carbon dioxide and water are always products.                                               WRITE AND BALANCE THE EQUATION FOR THIS REACTION.                          CH3OH + O2--> H20 + CO2
   

Whoosh Bottle

HOMEWORK: Homework worksheet 7-2 DUE TUESDAY 2/7

MONDAY 2/3

Illinois Standards: 12C, 12.11.57

4.  Single Replacement: WRITE AND BALANCE THE EQUATION FOR EACH REACTION. 

• LEAD NITRATE & SODIUM IODIDE yields (YELLOW PPT= lead iodide)
  Pb(NO3)2(aq) + NaI(aq) -->  Na(NO3)(aq)  + PbI2(s)  
• LEAD NITRATE & SODIUM CHLORIDE yields (WHITE PPT= lead chloride)
  Pb(NO3)2(aq) + NaCl(aq)  -->  Na(NO3)(aq)  + PbI2(s)  
• LEAD NITRATE & SODIUM SULFIDE yields (BLACK PPT = lead sulfide)                                              
• Pb(NO3)2(aq) + NaI(aq)  -->  Na(NO3)(aq)  + PbS(s)  
  CONCEPTS: In a double replacement reaction, the reactants are 2 compounds in an aqueous solution. The metal ions in these reactions switch places and become 2 new compounds. Because a precipitate is formed (solid that does not dissolve in water) as a product, these reactions are not reversible. If a gas is the product, this may also be the case. 

Homework: #7-2  DUE Next TUESDAY

1. Sodium is added to water and water; It skips along and sometimes pops disappearing and changing to the pink liquid (phenolphthalein indicator) indicating a base has been produced (NaOH).....    Na(S)   + H2O --> NaOH(aq)  + H2 
2. POTASSIUM AND WATER! Same reaction only faster and bursts into flame. KOH is produced and hydrogen gas. K(S)  + H2O  -->
   O....
3. NAIL BOTTLE ROCKET- Two nails are put in the side of 2 L plastic bottle.  Methanol is added to the bottle, warmed, and corked. A Tesla Coil is used to deliver electricity. The electric current starts the combustion reaction of the methanol. The cork shoots up making a loud noise.   CH3OH + O2  -->
   

First Day: Chemical Reactions Lab 7

1 report /person (3 DAYS)
*Homework: Homework #7-2Due Tuesday

Teacher's Institute Day: No Students

Illinois Standards: 12C, 12.11.57
Each student must record his own data on a separate sheet
LAB DAY: W217 Day #2: Chemical Reactions Lab 7 (3 DAYS)

  
At the beginning the copper metal is combined with nitric acid Homework: Lab 7 Report  Due WEDNESDAY
TUESDAY 2/7

Illinois Standards: 12C.12.11.57
Finish lab Cu Rxns-clean-up;

In the final step, when aluminum metal is added to the copper chloride solution, the copper metal returns to its elemental state.
Go over lab reports, give Lab quiz Homework:  Lab 7 Copper Reactions

Bring book to class TUESDAY& WEDNESDAY Decomposition of Ammonium Dichromate. In this decomposition reaction, the chromium +6 ion is reduced into a chromium +3 and the nitrogen ion is oxidized into N with 0 charge. This is known as Oxidation-Reduction (or Redox) (NH₄) ₂ (Cr₂O₇)_----->  Cr₂O₃ + 4 H₂O +  N₂

1. Questions about Practice QuizGo over Practice Quiz
   
2. BALANCING EQUATIONS RACE
3. TAKE CHAPTER 7 QUIZ

TUESDAY 2/14 Illinois Standards: 12C, 12.11.49; 12.11.57

Happy Valentines Day!

Find Chemistry Valentines & turn them in for chem treats!

RETURN Quiz on Chapter 7 (Questions?) Chemical Kinetics---

SHOW Video: Molecules in Action 
Homework: #18-1 worksheet due Thursday