Post on 18-Mar-2018
transcript
Table of Contents
1. FTF’s
2. Balancing Chemical Equations
3. PhET Lab: Balancing Ch…
4. Interpreting Graphics
5. Ch. 11.2 notes
6. Chemical Reactions Lab
7. Chemical Reactions practice wksh
8. Chemical Reaction Types
FTF Day 14
• Feb 28, 2012
• HW: Folder Check quiz on Thursday.
• Topic: Review Tests, Discuss homework policy, start chemical equations
• Questions: What is the Law of Conservation of Mass?
Activities
• Turn in Section Review Ch. 10 right now.
• Review Tests
• Discuss homework policy
• Start chemical equations
Law of Conservation of Mass
Mass can neither be created nor destroyed
In a physical change or chemical reaction, mass is conserved.
The reactants must equal the products.
Vocabulary
• Reactants – substances present at the start of the reaction
• Products – substances produced by the reaction (present after the reaction)
FTF Day 15
• Feb 29, 2012
• HW: balancing equations (Thursday), folder check quiz (Thursday)
• Topics: Balancing equations
• Questions: identify the symbols in this equation:
CH4(L) + O2 (G) CO2 (G) + H2O (G)
What is a skeleton equation?
– Includes the formulas of the reactants and the formulas of the products, but might not be balanced.
– Useful for describing what happens in a chemical reaction
– Not useful for describing quantities of reactants and product.
FTF Day 1
Staple papers from old folder and start a new table of contents. (You may want to keep day 14 and 15)
March 2, 2012
HW: PhET lab Balancing Chemical Equations (Due Monday), Interpreting graphics (Tuesday)
Topics: Balancing Chemical Equations
Questions:
1. What is the difference between a skeleton equation and a balanced equation?
2. Balance this equation: Al + HCl AlCl3 + H2
Activities
• Start a new folder (keep day 14 and 15 in folder) and a new table of contents.
– Keep old papers to study for final!!
• Work on “PhET lab Balancing Chemical Equations”.
• Interpreting graphics activity
• Start Reading Ch. 11.3
FTF Day 2
• March 5, 2012
• HW: PhET Lab Due today, Interpreting Graphics Due Tomorrow. LAB WEDNESDAY
• Topics: Types of Chemical Reactions
• Question:
– Balance this equation
C8H18 + O2 CO2 + H20
Sort of funny analogy for chemical reactions
• http://www.youtube.com/watch?v=XS6JTr-mTWY
FTF Day 3
• March 6, 2012
• HW: LAB tomorrow, wear proper clothing.
• Topic: Types of reactions
• Question:
1. Balance this equation.
2. What type of reaction is this?
Na(s) + H2O(l) ----> NaOH(aq) + H2(g)
Activities
• 4 minutes of quiet studying
• Turn in “Interpreting Graphics”
• Watch demos
• Discuss tomorrow’s lab
Turn your paper sideways and make this chart.
Type of Reaction
Reactants Predicted products
Observations Balanced chemical equation
Single Replacement Rxn
A + BC B + AC
Pay attention to which parts of each compound are Cations / Anions.
Double Replacement Rxns
AB + CD AD + CB
Pay attention to which parts of each compound are Cations / Anions.
Combustion Rxns
• Anything that reacts with O2.
• Usually a Hydrocarbon is a reactant
• Usually CO2 and H2O are products.
Single/Double Replacement Rxns More active elements WILL replace less active elements.
Less active elements will NOT replace more active elements.
Examples:
Li + NaCl Na + LiCl2
Mg + NiF2 No Rxn
No FTF Today
• Instructions:
1. Take out notes Ch 11.2 and a pencil
2. Put backpacks/books at the front of the room.
3. Get goggles and a lab apron.
4. Return to desk and wait quietly for further instructions.
FTF Day 4
• March 19, 2012
• HW: Turn in Lab and Practice Wksh tomorrow
QUIZ Wednesday
• Topic: review reactions
• Questions: none