c: 4 january 2012

C: 4 January 2012

Grab a calculator and find your new seat.

Objective: You will be able to: convert between number of

atoms/molecules, moles and mass of any element or compound.

Do now: Search in your notes: a. What is a mole? b. How many atoms/molecules are in

a mole?

Agenda

I. Do nowII. Review: The MoleIII. Mole to atoms/molecules conversionsIV. Practice ProblemsV. Mole to mass conversionsVI. Practice ProblemsHomework: Week 17 Homework page 1-

2: tomorrowHey, did I get your lab report?!

Calculators

You’re going to need a calculator to complete homework for the rest of the year.

Come work in here Tues. and Thurs. Buy a $10 scientific calculator

must have scientific notation Use your cell phone (at home).

The Mole

Atoms are so tiny; how do we quantify their masses?

The mole: a unit for amount of substance

In groups of 6.02 x 1023 atoms or molecules

6.02 x 1023 atoms/molecules = 1 mole 6.02 x 1023 atoms/molecules =

Avogadro’s Number

Big Questions

http://www.youtube.com/watch?v=s0zxF66nbRU

If you react 5.0 grams of oxygen with 5.0 grams of hydrogen, what will you produce?

How many grams will be produced? Will there be oxygen or hydrogen

left over? If so, how much?



Convert Between Moles and Number of Atoms/Molecules

moleXatomsx

atomsxmoleX

11002.6

1002.61

23

23

Same two fractions for ANY element or compound!!

Example 1

How many atoms of silver are in 5.00 moles of silver?

Example 2

How many molecules of water are in 3.5 moles of water?

Example 3

How many moles of sodium are equal to 1.50x1024 atoms of sodium?

Example 4

How many moles of water are equal to 5,000.0 molecules of water?

Practice Problems

1. Convert 3.01 x 1023 atoms of silver to moles.

2. Convert 2500 molecules of water to moles.

3. How many atoms of carbon are in 3.2 moles of carbon?

4. How many atoms of beryllium are in 2.1x1014 moles of beryllium?

Homework

Week 17 Homework page 1 and…did I get your lab report?!

Atoms to Moles

How many atoms of sodium are in 0.5 moles of sodium?

How many atoms of oxygen are in 1.5 moles of oxygen?

How many atoms of fluorine are in 0.075 moles of fluorine?

How many atoms of argon are in 3.45 moles of argon?

C: 5 January 2012

Take Out Homework: Week 17 p. 1 Objective: You will be able to:

convert between mass and number of moles of a sample of any element or compound.

Do now: How many moles are equal to 2,300,000 molecules of methane? Show your work!

Agenda

I. Do nowII. Homework answersIII. Review converting between moles and number

of atoms/moleculesIV. Converting between moles and mass of

elements and compoundsV. Practice ProblemsVI. TicketVII. Moles Conversions StationsHomework: Week 17 Homework page 2: Fri.Quiz Monday on atom/molecule, mole, mass

conversions

Converting between moles and mass of elements

Two possible conversion fractions:

)(_1

gmassatomicmole

molegmassatomic

1)(_

Example 1

Calculate the mass in grams of 3.50 moles of hydrogen.

Example 2

Calculate the number of moles equal to 10.0 grams of silicon.

Practice Problems1. What is the mass in grams of 3.50 mol of

copper? 2. What is the mass in grams of 2.25 mol of

iron?3. How many moles of aluminum are equal

to 11.9 grams of aluminum?4. How many moles of calcium are equal to

5.00 grams of calcium?

What if you’re working with a compound, not an element?

Mass = molar mass! Review: Calculate the molar mass of

water.

Example 1

Calculate the mass of 3.0 moles of water.

Example 2

Calculate the number of moles equal to 0.50 grams of carbon dioxide.

Converting Between Moles and Mass

1. Calculate the mass of 5.00 moles of methane.

2. Calculate the number of moles equal to 5.00 grams of boron trifluoride.

3. Calculate the mass of 0.50 moles of ammonia (NH3).

4. Calculate the number of moles equal to 1,000. grams of water.

Objective Ticket

Start your homework if you finish early.

Homework

Week 17 Homework page 2: Fri. Quiz Mon. on atom/molecule, mole,

mass conversions

C: 6 January 2011

Grab a calculator Take Out Homework: Week 17 p. 2 Objective: You will be able to:

convert between number of atoms/molecules, moles and mass of a sample of any element or compound.

Do now: Calculate the mass of 5.00 moles of magnesium chloride (MgCl2).

Agenda

I. Do nowII. Check homeworkIII. Finish conversion stationsHomework: Week 17 page 3-4: Mon.Quiz Monday on atom/molecule,

mole, mass conversions

Mass to moles to atoms lab

On the front: Find the mass of the sample.

Subtract the mass of the container (given on the card).

Convert to moles Convert to number of atoms

Always show all your work! A correct answer = a number +

units + element/compound

On the back: Copy down the number of atoms

(from the card) Convert to moles Convert to mass Check your answer by massing

the sample on the balance.

C: Homework

Week 17 Homework p. 3-4: Mon. Quiz Mon. on atoms/molecules,

moles, mass conversions

C: Homework

Week 17 Homework p. 2: tomorrow

C: 9 January 2012

Grab a calculator and your green folder

Take Out Homework: Week 17 p. 3-4 Objective: You will be able to:

convert between atoms/molecules, moles and mass of any element or compound.

Do now: How many atoms are there in 1.00 gram of zinc? (Do this in two steps.)

Agenda

I. Do nowII. Homework answersIII. QuestionsIV. Quiz on 4.1 and 4.2V. Hand back work/progress

reports/clean out foldersVI. Demo: chemical changeHomework: None!

Quiz

When you finish, raise your hand. Track your last Unit 3 Quiz Clean all Unit 3 materials out of

your folder and paperclip them together, with your tracking sheet on top.

Leave this pile on your desk for stamps.

Then, after the quiz, put it in your green folder.

C: 12 January 2012

Grab your green folder Objective: You will be able to:

write correct formula equations for chemical reactions

Do now: Brainstorm: Write down as many indications (signs) of a chemical reaction as you can.

Agenda

I. Do nowII. Organize/stampIII. Chemical reactions notes and demoIV. Writing equations examplesV. Practice problemsHomework: Week 18 Homework #1-3, 7-9:

Fri.Late work/Lab report rewrites by

Weds. Jan. 18

10 min. to organize

1. Organize your folder/notebook.2. Stack up and paperclip all Unit 3

materialsPut your tracking sheet on top.

3. Track your last Unit 3 Quiz.4. Get stamps!5. Put your papers in your green folder in

the bin.**You must be in your seat unless you

are putting your folder in the bin.**

Chemical Reactions

Demo

In your notebook, record your observations.

Indications of a Chemical Reaction

1. Heat and Light2. Production of a Gas (bubbles)3. Formation of a precipitate

A solid produced as a result of a reaction between two solutions

4. Color change

chemical reaction: changing substances to other substances by breaking bonds in reactants and forming new bonds in products.

http://www.youtube.com/watch?v=F54rqDh2mWA



Chemical Equations

How do chemists describe chemical reactions?

chemical equations: an expression representing a chemical reaction

Word Equation

Hydrogen gas combines (explosively!) with oxygen gas to produce water vapor reactants: hydrogen, oxygen products: water

Formula Equations

H2(g) + O2(g) H2O(g)

(s) – solid, (l) – liquid, (g) – gas (aq) – aqueous (dissolved in water)

Reactants

Products

Symbols

+ and, reacts with yields (to yield), produces (to

produce), forms (to form)

Diatomic molecules

7 elements make diatomic molecules:

H2, N2, O2, F2, Cl2, Br2, I2

“7 make a 7” HINClBrOF

You must be sure to write correct chemical formulas for reactants and products!

Write the word equation

Na2O(s) + H2O(l) NaOH(aq) Solid sodium oxide reacts with water

to yield a solution of sodium hydroxide

Write the formula equation

Solid copper reacts with a solution of silver nitrate to yield solid silver and a solution of copper (II) nitrate.

Cu(s) +AgNO3(aq) Ag(s) + Cu(NO3)2(aq)

C: 13 January 2012

Take Out Homework: Week 18 #1-3, 7-9

Objective: You will be able to: write correct formula equations for

chemical reactions Do now: Write the word equation:Zn(s) + HCl(aq) ZnCl2(aq) + H2(g)

Agenda

I. Do nowII. Writing equations practice problemsIII. Exit ticketHomework: Week 18 Homework #4-6

and 10-18: WednesdayLate work/Lab report rewrites by

Weds. Jan. 18

Practice

1. Solid magnesium reacts with oxygen gas to yield solid magnesium oxide.

Practice Worksheet

Complete pages 3-4 with your partner

Exit ticket

Homework

Week 18 Homework #4-6 and 10-18: Wednesday

Late work/Lab report rewrites by Weds. Jan. 18

A: 12 January 2012

Take Out Homework: Week 18 # 1-3, 7-9

Objective: You will be able to: write formula equations for

chemical reactions Do now: Write correct formulas for:

a. iron (III) oxide

b. nitrogen dioxide

Agenda

I. Do nowII. Check homework and answersIII. Writing formula equations practiceHomework: Week 18 Homework #4-

6 and 10-12Late work/Lab report rewrites by

Weds. Jan. 18

Writing Formula Equations

Complete pages 1-2 with your partner.

C: 18 January 2012

Take Out Homework: Week 18 #4-6, 10-12

Objective: You will be able to: use the law of conservation of

mass to balance chemical equations

Do now: Write the formula equation for:

Solid magnesium reacts with oxygen gas to yield solid magnesium oxide.

Agenda

I. Do nowII. Paperclip Mini-labIII. Balancing Equations ExamplesIV. Practice ProblemsHomework: Finish paperclip mini-

lab: Thurs.Week 18 Homework pages 5-6: Thurs.

Midterm Exam

Wednesday, January 25 10:15 am -12:05 pm Bring a calculator, pens/pencils You’ll get a periodic table and

polyatomic ions list

Midterm Exam

29 Questions, most with 2 parts A mix of multiple choice and short

answer/problem solving Some have tier III questions – at end of

test On most objectives in Units 1-5

Your review sheet will tell you which ones.

Very similar to quiz and homework questions you’ve seen.

Paperclip Mini Lab p. 1-2

You and your partner share on bag of paperclips.

Follow the directions exactly. Be sure to record data as specified by the

directions. To bond, unlink paperclips completely

from the original compounds and then relink them to form the new compound.

Unlink all paperclips and return to bag when you finish!

Law of Conservation of Mass

In a chemical reaction, matter is never created or destroyed.

The number of atoms and the mass of each element of the reactants must be equal to the number of atoms and the mass of element of the products.

This is shown by placing a coefficient in front of the formula for each compound.

HHHHHHHHHHHH

OOOOOOOOOOOO

CCCCCCCCCCCC

H

HH

HH

HH

HHHH

H

O O

O O

O O

O O

O O

OO

H HH H

HH

HH

HHHH

OO

OO

OO

OO

OO

OO

CCCCCCCCCC

C

C

H2(g) + F2(g) HF(g)

H2(g) + F2(g) HF(g)2

H2O(l) H2(g) + O2(g)

H2O(l) H2(g) + O2(g)2 2

Balancing Chemical Equations

Ca(s) + S8(s) CaS(s)

Ca(s) + S8(s) CaS(s)8 8

Zn(s) + HCl(aq) ZnCl2(aq) + H2(g)

Zn(s) + HCl(aq) ZnCl2(aq) + H2(g)2

Balancing Equations

1. H2 + O2 H2O

2. ZnS + O2 ZnO + SO2

3. Ag3PO4 + KBr K3PO4 + AgBr

4. H2SO3 + O2 H2SO4

5. Na2SO4 + Fe(NO3)3 NaNO3 + Fe2(SO4)3

6. AgNO3 + CaCl2 AgCl + Ca(NO3)2

Now:

Finish the paperclip lab page 3 Rank your studying priorities on

pages 1-3 of the midterm review guide Both of these things are due

tomorrow!

Assignment

Paperclip Mini-lab Handout with your partner

Homework

Finish paperclip mini-lab Week 18 Homework pages 5-6

both due tomorrow

C: 19 January 2012

Take Out Homework: Paperclip Mini-Lab and Midterm Review Packet

Objective: You will be able to: balance chemical equations to satisfy the

law of conservation of mass and review for the midterm

Do now: Write and balance: Solutions of silver nitrate and calcium

chloride react to form solid silver chloride and a solution of calcium nitrate.

Agenda

I. Do nowII. Homework answersIII. Writing and balancing equations

practice challenge!IV. Unit 1 ReviewV. Midterm review packet work timeHomework: Finish Unit 1 Review

questions AND Priority 1 and 2 Questions: Fri.

On your Priorities Ticket

Write down your top three priority units.

We’ll use these to make work groups tomorrow and Monday.

Midterm Exam



Unlock the Code!

1. With your partner, write and balance four equations.

2. Place the correct coefficients into the blanks at the top of the page.

3. Come up and try the lock!4. Hand in your worksheet.5. Start Unit 1 Review problems with

your partner.

Unit 1 Review

1. With your partner, complete the Unit 1 Review questions (p. 3-7)

2. When you finish, decide on your next priority and begin those questions.

1. You will receive a class work grade out of 10 points for your work today.

2. Stay in your seat, work quietly, stay on task

Homework: Unit 1 Questions and your Priority 1 and 2 Questions due tomorrow.

A: 19 January 2012

Take Out Homework: Week 19 Homework

Objective: You will be able to: review Unit 1 for the midterm

exam. Do now: List the steps of the

scientific method. Then, write a hypothesis for the

research question: Will my jeans shrink more each time I put them in the dryer?

Unit 1 Review

Unit 1 is a HUGE priority for this class!

So, let’s review together.

Na2O2 + H2O NaOH + O2

2Na2O2 + 2H2O 4NaOH + O2

CaCl2 + Fe2(SO4)3 CaSO4 +

FeCl3

3CaCl2 + Fe2(SO4)3 3CaSO4 +

2FeCl3

Al2O3 + HCl AlCl3 + H2O

Al2O3 + 6HCl 2AlCl3 + 3H2O

KClO3 KCl + KClO4

4KClO3 KCl + 3KClO4

AgNO3 + CaCl2 AgCl + Ca(NO3)2

2AgNO3 + CaCl2 2AgCl + Ca(NO3)2

Na2SO4 + Fe(NO3)3 NaNO3 + Fe2(SO4)3

3Na2SO4 + 2Fe(NO3)3 6NaNO3 + Fe2(SO4)3

C12H22O11 + O2 CO2 + H2O

C12H22O11 + 12O2 12CO2 + 11H2O

BaCl2 + (NH4)2CO3 BaCO3 + NH4Cl

BaCl2 + (NH4)2CO3 BaCO3 + 2NH4Cl

Liquid silicon tetrachloride reacts with liquid water to produce solid silicon dioxide and a solution of hydrochloric acid.

SiCl4(l) + 2H2O(l) SiO2(s) + 4HCl(aq)

Nitrogen gas reacts with oxygen gas and water to produce a solution of hydrogen nitrate.

2N2(g) + 5O2(g) 2H2O(l) 4HNO3(aq)

KOH + Cl2 KCl + KClO3 + H2O

6KOH + 3Cl2 5KCl + KClO3 + 3H2O

Balancing Equations Practice Worksheet

A: 18 January 2012

Grab your clicker! Take Out Homework: Week 18 p. 5-7 Objective: SWBAT classify reactions as

one of the five types of chemical reactions.

Do now: Balance:Na2SO4 + Fe(NO3)3 NaNO3 +

Fe2(SO4)3

Agenda

I. Do nowII. Homework solutions balancing equationsIII. Balancing Equations Exit TicketIV. Types of Reactions NotesV. Clicker Practice ProblemsVI. Midterm Studying SurveyHomework: Week 19 Homework: Thurs.Finish “Unlock the Code” Worksheet

(optional)

Midterm Exam



Exit Ticket

Balancing Reactions

Types of Chemical ReactionsReaction Type General

EquationDefinition

Example

Composition

Decomposition

Single Replacement

Double Replacement

Combustion

Composition Reaction

• General Equation: A + X AX

• Definition: two or more substances combine to form a new compound.

• Example: 4Li(s) + O2(g) 2Li2O(s)

Composition

Li + O2

O

Li2OLi O

Decomposition Reaction

• General Equation: AX A + X

• Definition: a single compound breaks down into two or more simpler substances.

• Example: 2H2O(l) 2H2(g) + O2(g)

Decomposition

KClO3 KCl + O2

K

ClO

OO

K

ClOO

Single Replacement Reaction

General Equation: A + BX AX + B

Definition: One element replaces a similar element in a compound.

Examples: Mg + 2HCl H2 + MgCl2

2Al + Pb(NO3)2 3Pb + 2Al(NO3)3

Single Replacement

KI + Br2 KBr + I2

BrK

BrI

Double Replacement Reaction

General Equation: AX + BY AY + BX

Definition: the ions of two compounds exchange places in an aqueous solution to form two new compounds.

Example: 2KI(aq) + Pb(NO3)2(aq) PbI2(s) + 2KNO3(aq)

Double Replacement

CuCl2 + Na2S 2NaCl + CuS

Cl Cl

CuNa Na

S

Combustion Reaction

General Equation: CxHy(g) + O2(g) CO2(g) + H2O(g)

Definition: a substance combines with oxygen and releases a large amount of heat (exothermic) or light energy

Example: C2H6(g) +O2(g) CO2(g) + H2O(g)

A + Y AY

1 2 3 4 5

20% 20% 20%20%20%

1. Composition Reaction2. Decomposition Reaction3. Single Replacement

Reaction4. Double Replacement

Reaction5. Combustion Reaction

A + BX B + AX

1 2 3 4 5

20% 20% 20%20%20%




AB A + B

1 2 3 4 5

20% 20% 20%20%20%




AB + XY AY + XB

1 2 3 4 5

20% 20% 20%20%20%




A + O2 CO2 + H2O

1 2 3 4 5

20% 20% 20%20%20%




2H2O 2H2 + O2

1 2 3 4 5

20% 20% 20%20%20%




2C + O2 2CO

1 2 3 4 5

20% 20% 20%20%20%




Mg + CdCl2 Cd + MgCl2

1 2 3 4 5

20% 20% 20%20%20%




Al2(SO4)3 + 3Ca(OH)2 2Al(OH)2 + 3CaSO4

1 2 3 4 5

20% 20% 20%20%20%




2C6H14 + 19O2 12CO2 + 14H2O + heat

1 2 3 4 5

20% 20% 20%20%20%




BaO + H2O Ba(OH)2

1 2 3 4 5

20% 20% 20%20%20%




2NaNO3 2NaNO2 + O2

1 2 3 4 5

20% 20% 20%20%20%




AgNO3 + NaCl AgCl + NaNO3

1 2 3 4 5

20% 20% 20%20%20%




2Al + 3ZnCl3 3Zn + 2AlCl3

1 2 3 4 5

20% 20% 20%20%20%




What does a combustion reaction require?

1 2 3 4 5

20% 20% 20%20%20%

1. Heat2. Oxygen3. Carbon dioxide4. Love5. Gasoline

Which type of reaction?

1. Al2(SO4)3 + 3Ca(OH)2 2Al(OH)2 + 3CaSO4

2. 2C6H14 + 19O2 12CO2 + 14H2O + heat3. BaO + H2O Ba(OH)2

4. 2NaNO3 2NaNO2 + O2

5. AgNO3 + NaCl AgCl + NaNO3

6. 2Al + 3ZnCl3 3Zn + 2AlCl3

7. What does a combustion reaction require?

Midterm Review!

What units are your studying priority?

Complete by the end of the period You’ll be assigned groups working

on your top priorities based on this survey!

Then, work on your 1st priority review or the Week 19 Homework

Homework

Week 19 Homework: tomorrow “Unlock the Code” worksheet

(optional) Start the Midterm Review packet

(optional)

A: 19 January 2012

Take Out Week 19 Homework Objective: You will be able to:

review Unit 1 for the midterm! Do now: Fill in a Venn diagram: phosphide phosphate

Take Out Week 19 Homework Objective: You will be able to:

review Unit 1 for the midterm! Do now: Fill in a Venn diagram: phosphide phosphate

Agenda

I. Do nowII. Homework AnswersIII. Unit 1 Review with a partnerIV. Begin your second priority unit reviewHomework: Finish Unit 1 Review questionsFinish your priority #2 review questionsUnlock the code = extra credit: tomorrow

Extra Help

Today: 3:30-4:30 Monday and Tuesday at lunch Tuesday: 3:30-4:30

Your grade

10 point class work grade: follow directions stay on task work quietly with only your

partner stay in seat unless using a

scavenger hunt clue

A: 20 January 2012

Take Out: Midterm Review Packet Objective: You will be able to:

review your second and third priority units for the midterm!

Do now: a. How many atoms are in a mole of calcium?

b. How many atoms are in 0.50 moles of calcium atoms?

AgendaI. Do nowII. Today’s assignment and GroupsIII. Check Unit 1 answers with groupIV. Check assigned unit answers with groupV. Unit 4 Review as a classVI. Begin 3rd priority review questions

independentlyHomework: Complete your third priority

review questions (started in class) Then, complete the questions for one more

unit. You should have FOUR units complete! due Monday

Your #2 Priority: Check answers

Unit 2a: Garlyn, Joey, Sophie, Unit 2b: Larissa, Emily, Zuri Unit 2c: Ricardo, Israel Unit 2d: Trae, Marie, Julian Unit 3: Loveng, Brunyr, Crystal Unit 4: Karen, Hannah

Homework

Complete your third priority review questions (started in class)

Then, complete the questions for one more unit. You should have FOUR units

complete! due Monday

C: 20 January 2012 Take Out: Review Packet Objective: You will be able to:

review your 2nd and 3rd priority units for the midterm.

Do now: Fill in Venn diagram: phosphide phosphate

Agenda

I. Do nowII. Groups and AssignmentIII. Check Unit 1 AnswersIV. Check Assigned Unit AnswersV. Complete 3rd priority review questionsHomework: Finish 3rd priority review

questionsDo one more unit: Due Monday.

Groups

Unit 2a: Javier, Dyani, Lorreno Unit 2b: Jackson, Nekeyla, Bryan Unit 2c: Meryem, Martely, Carlheb Unit 2d: Leslie, Patrick, Christine Unit 3a: Devin, Jesse, Kenny Unit 3b: Courtney, Obayanna, Daysia Unit 5: Adley, Kendra, Carla

Today’s assignment

1. With your group, check your answers to the Unit 1 Review Questions (10 min.)

2. Then, with your group, check your answers to review questions for your assigned unit (10 min.)

3. Finally, work independently to complete the review questions for your third priority unit. (remaining time)

Class work grade

10 points possible: Stay in your seat unless you’re

scavenging. Talk quietly and only with

members of your group. Stay on task and complete the

work!

Homework

Finish 3rd priority review questions Do one more unit: Due Monday.

You will have FOUR units done by Monday!

Extra Help

Today: 3:30-4:30 Monday and Tuesday at lunch Tuesday: 3:30-4:30

A: 23 January 2012

Take Out: Midterm Review Packet Objective: You will be able to

review objectives for the midterm exam.

Do now: Write an equation:A solution of sodium nitrate and solid lead (II) oxide react to form a solution of lead (II) nitrate and solid sodium oxide.

Agenda

I. Do nowII. Questions?III. Review work timeHomework: Check your review

answers!Study for midterm on WednesdayBring a calculator!Extra help Tuesday, 3:15-3:45 pm

Review Packet Answers

on the blog! I made a mistake on the second

balancing the equation problem – fix it for bonus points. Give me your correction tomorrow at the exam.

A review problem together!

A solution of sodium nitrate and solid lead (II) oxide react to form a solution of lead (II) nitrate and solid sodium oxide.

1. Write and balance the equation.2. Calculate the molar mass of lead (II)

nitrate.3. How many moles are equal to 10.0

grams of lead (II) nitrate?4. How many molecules is that?

On your own

Complete the review questions for any unit you have left.

You may quietly ask your partner if you have questions, but are working on your own.

Raise your hand if you have questions!

Questions?