Agenda• Catalyst• New Procedures• Notes• Practice Problems• Go Over Answers• Exit Question

Catalyst (Do NOT do this on your weekly sheet!!)

• What is your goal for the rest of this year?• What would be the best job or other thing

that you could have in the next 10 years of your life?

• …Is chemistry important

Well, do you like money?Average Salaries and Education

Why care about chemistry? (TPS)1. So you can graduate. ($$$)2. If you’re going to college, you’ll probably take

chem there. Make it easy! ($$$)3. Develop your brain.4. Develop organization and study skills.5. Understand the universe!

Why care about chemistry? (TPS)1. So you can graduate. ($$$)2. If you’re going to college, you’ll probably take

chem there. Make it easy! ($$$)3. Develop your brain.4. Develop organization and study skills.5. Understand the universe!

3 Min: Think and write a few sentences about how this chemistry class will be useful

for your life goals – whatever they are.

Some dataStudent A Student B

Late to class once per week or less

Late to class 3 or more days per week

50/50 weekly point sheet grade

28/50 point sheet grade

Asks questions when he/she doesn’t get it

Doesn’t pay attention, answers “I don’t know”

Takes notes needed to understand

Takes some notes or no notes

Organized binder No notebook

Some dataStudent A Student B

Never talks out of turn, helps neighbor understand

Talks out of turn, disturbs neighbor’s learning

Works hard to understand the concepts during class work

Copies answers to class work or guesses at the answers

Who do you think did better on the test?

Now…1. Decide on one of these actions that will be

import to help you succeed. 2. Write a sentence or two about how today’s

objective will help you achieve your life goals.

Student A Student B

A on test F on test

KP#1: A chemical equation shows which compounds and elements are in a chemical reaction.

• NaNO3(aq) + KCl(aq) � NaCl� (aq) + KNO3(aq)

Reactants Products

Reaction Occurs

PhaseAnd

Today, we will classify 5 different types of reactions.

1. Synthesis2. Decomposition3. Single Replacement4. Double Replacement5. Combustion

The next 5 slides are like a big key point #2.

Type #1: Synthesis• Two reactants combine to form one

product.• A + B -> AB

• Examples: –Fe(s) + O2(g) FeO(s)

–2Li + Br2 2LiBr

Type #2: Decomposition• One reactant splits into two or more

products• AB -> A + B • Examples:–2PbSO4 2PbSO3 + O2

–2H2O 2H2 + O2

Type #3: Single Replacement• A single element replaces another

element in a compound• A + BX -> AX + B

• Examples:–3Mg + 2AlCl3 3MgCl2 + 2Al

–MgBr2 + Cl2 MgCl2 + Br2

Type #4: Double Replacement

• AB + CD -> AD + CB• The cations and anions from two compounds

switch partners.• Examples:– NaNO3(aq) + KCl(aq) � NaCl� (aq) + KNO3(aq)

– NaBr + H3PO4 Na3PO4 + HBr

Type #5: Combustion• A substance reacts with oxygen, releasing

energy (Fire!)• A + O2 -> AOx

• CxHy + O2 -> CO2 + H2O

• Examples: –C + O2 -> CO2 (Burning Coal)

–C3H8 + 5O2 -> 3CO2 + 4H2O

Try these:

1. MgCO3 -> MgO + CO2

2. Pb + S8 -> PbS2

Try these:

1. MgCO3 -> MgO + CO2

2. Pb + S8 -> PbS2

1 R, 2 P means DECOMPOSITION

2 R, 1 P means SYNTHESIS

Try these:

1. Fe + Ag2SO4 -> FeSO4 + 2Ag

2. K2SO4 + Pb(NO3)2 -> 2KNO3 + PbSO4

3. CH4 + 2O2 -> 2H2O + CO2

Try these:

1. Fe + Ag2SO4 -> FeSO4 + 2Ag

2. K2SO4 + Pb(NO3)2 -> 2KNO3 + PbSO4

3. CH4 + 2O2 -> 2H2O + CO2

SINGLE REPLACEMENT

DOUBLE REPLACEMENT

COMBUSTION

Practice Time

• First 10 Mins: Work Silently, Independently• Next 20 mins: You may collaborate– Teach and tutor for bonus points!

• Stay in your seat.

• When time is up, we will go over the answers.

Exit Question

Classify the following reaction:a. CuCl + K → KCl + Cub. CuCl + KF → CuF + KClc. 2H2 + O2 → 2H2O