What % of URINE, times its own weight, does Sodium polyacrylate(the powder in disposable diapers) absorb? Guess who is a college Sophomore this year?

Diaper Lab day #1

So serious, not Soterios

More photos

Diaper Trivia:

Water lok absorbs 800 times its own weight of Distilled H₂O.

Water lok absorbs 300 times its own weight of Tap H₂O.

Problem:

What % of URINE, times its own weight, does Sodium polyacrylatethe white powder in disposable diapers)absorb?

Practice with tap water. Look here for consistency

1//04

Find the density of Urine and I will show you the
Recipe we will use in class. NaCl? + Distilled water?

1//04

Make up synthetic Urine. Food coloring optional.
Start trials with distilled water.

1//04

Hand in labs and quiz time

9/10/02

Scientific Notation - Assign problems

Bring your calculator!!!!

Make sure you know how to convert back and forth from standard form
to scientific notation. This will help speed up the math component of the assignment.

Did you bring your calculator!!!!

The exactness of measurements is an important part of experimentation. The exactness of a measurement is indicated by. the number of significant digits in that measurement. The observer and anyone reading the results of an experiment want to know the number of significant digits in any observation. The following rules are used to determine the number of significant digits in a recorded measurement.

1. Digits other than zero are always significant.

        96 g 2 significant digits
        61 .4 g 3 significant digits
        0.52 g 2 significant digits

2. One or more final zeros used after the decimal point are always significant.

4.7200 km 5 significant digits
82.0 m 3 significant digits

3. Zeros between two other significant digits are always significant.

5.029 m 4 significant digits

306 km 3 significant digits

4. Zeros used solely for spacing the decimal point are not significant. The zeros are placeholders only.

7000 g 1 significant digit

0.007 83 kg 3 significant digits

The 4 rules above were obtained from the Merrill Textbook 1990 editior

1. Significant Figures Worksheet

2. Scientific Notation Worksheet

9/11/02

Practice here . You vs. your lab partner

9/12/02

Quiz

9/16/02

Start next lab

Problem: Are new pennies made out of solid Copper?

What is the unknown metal found inside?

What year did the composition of a penny change?

Step 1

Find the density of a penny.

Calculate it's % error.

Look up the density of copper in your text.

Remember you need to know mass and volume

and dry the pennies before you take mass for other trials

Find density of unknown metal.

Step 2

Check out Penny lab photos and collect unknown metal from
your post 1982 pennies.

Penny lab photos

Now to solve the problem:

What is the unknown metal found inside a post 1982 penny?

9/20/02

Finish up lab and start write up

9/23/02

Start Equation writing today.

Review the following in your textbook:

Oxidation #'s , polyatomic ions, roman numeral method
used with the transition elements, & diatomic molecules.

Problem set #1 (Use your text for help & look at examples for help)

Write the correct chemical formula for each of the following compounds.

1. potassium bromide 2. lithium iodide 3. magnesium chloride

4. hydrogen sulfide 5. sodium oxide 6. calcium fluoride

7. beryllium chloride 8. aluminum bromide 9. hydrogen iodide

Problem set #2

Give the correct names for each of the compounds.

1. NaCl 2. CaSO₄ 3. HCl

4. AlBr₃ 5. CO₂ 6. Al₂(SO₄)₃

7. NH₄NO₃ 8. H₂SO₄ 9. ZnO

9/24/02

Problem set #3

Try to balance Problem set #3 If you are rusty at this
you might consider looking at your textbook for a little review

Page 98 in your textbook

Write and balance chemical equations for each of the following reactions.

1. nitrogen + hydrogen Yields ammonia

2. butane (C₄H₁₀) + oxygen    Yields    carbon dioxide + water
3. aluminum oxide    Yields     aluminum + oxygen
4. ethyl alcohol (C₂H₅OH) + oxygen      Yields    carbon monoxide + water
5. nitrogen + oxygen     Yields     dinitrogen pentoxide
6. octane (C₈H₁₈) + oxygen   Yields     carbon dioxide + water
7. aluminum sulfate + phosphoric acid    Yields    aluminum phosphate + sulfuric acid
8. diphosphorus pentoxide + water    Yields    phosphoric acid
9. ammonia + nitric oxide   Yields     nitrogen + water
Work on problems this week - go here
Steps for solving:
1. Write the balanced equation for the problem
2. Write down what is given and what you are to find under each in the equation
3. Identify the mole ratio from the balanced equation for given vs. what you are trying to find
4. Change given grams to moles or liters to moles depending on the problem
5. If your mole ratio is 1:1 than you have your answer in #4
6. If your mole ratio is not 1:1 then you must do a little algebra and solve for X
Can you do this problem?
What volume of oxygen is produced when 75.0 g of water is
decomposed by electrolysis? The answer is: 46.7 liters
Please be good to the today if I am not in school

Bored in Chemistry?

Try making the Chemical Board Game.

Go here for the rules.

Play each others games and rate them using: Grading rubric

Top score is a 40

So here is how your group should start:

1. WHAT'S THE GAME PLAN? Ideas for games can come from class, your textbook, the videos we looked at, or internet. Write down a list of vocabulary, labs, and activities.

        Then pick out one thing as the game idea. Next, think of an OBJECT for the game--this tells players what they have to do to win.

2. WRITE DOWN THE RULES! Write down a few basic rules that you will need to play the game: how to get started, how to move, how the game ends, special rules and so on.

     These rules will change as the game is tested by playing it with other people.

3. MAKE THE BOARD !   I have supplied your group with a blank board, dice and moving pieces. The IDEA is the most important thing.

     The game that PLAYS the best is better than the game that LOOKS the best.

     Remember you only get one board. Before you start drawing on it, make a design on Graph paper.

Ideas for your game:

Here are a list of terms with definitions A - Z

Periodic Table facts on each element

Chemistry demos

Safety Rules

Lab equipment helper

Metric review

Chemistry comics

Mole Day

Chemistry 4 kids

Balancing equations

Sig Figs

Electron Configuration

The labs we have done this year

And finally your textbook is full of information!

Surgery Photos
   Frayed old man's cartilage                        Partial torn ACL

Torn Meniscus                        Cleaned up and ready to rock & roll

Lewis Structure also called the electron dot:

Go here for help:

Site 1 Site 2 Site 3 If anyone finds a better one let me know.

Free answers here - check it out

You may also use your textbook on page (I don't know please look it up in the index)

Worksheet 1

Worksheet 2

Worksheet 3

Take the quiz and print out your results. Who is the smartest Westby Chemist? Here it is!

Play the game if you have time.

Advanced Chemistry for Thursday and Friday

Go here for help and I believe each site has problems you can try.
You may use your textbook on page (I don't know please look it up in the index) for help and practice.

Site 1 Site 2 Site 3

For the next 2 weeks

Intro to Titrations. Review technique and start lab.

Try this: Titration demo 1

Titration photos

Virtual chemistry lab for acid-base titration: here

9/25/02

Collect labs

Review 4 types of reactions

9/26/02

Play the balance game for time!! Chem Balancer

9/27/02

Quiz on penny lab

9/30/02

Hand out worksheets on balancing

work on in class and for homework

this week

10/7/02

Start Hindenburg Lab

Class photos

Purpose: To find the amount of hydrogen gas produced from a

single replacement reaction by adding zinc to hydrochloric acid.

Zn + 2HCl => ZnCl₂ + H₂

_{Students collect hydrogen gas using water
displacement. To check their answer,}

_{they compare the amount of gas collected
from a known amount of zinc and}

_{using the mole ratio from the balanced
equation they can calculate the % error}

_{in their experiment. Several trials
are run to see if they can reduce the % error.}

_{Hindeneggburg Photos}

Click here for complete lab ====> Egg-Splosive

10/10/02

Watch Magic School Bus

Chemistry of Making a Cake

Lab on Smores

10/11/02

No class Homecoming

10/14/02 Practice mole stuff this week

Next week is Mole Day
Click on me

How does Chem 3 want to celebrate this year?

Surf the web, get ideas, and class votes on what to do.

To mole or not to mole, that is the question

Student Photos

Mole problems in your yard

Mole Problems in the school

Celebrate Mole day which we should have done on 10 - 23 - 01

Click on Mole day above for the assignment. Photo page here

Celebrate Mole day which we should have done on 10 - 23 - 01

Click on Mole day above for the assignment. Photo page here

Start mole calculations Go here

Very easy Quiz coming up on mole calculations:

Next quiz be able to change g to moles, moles to g,

moles to things , things to grams (things = molecules, ions, atoms, formula units)

The Lallas problem solver: Given X appropriate conversion factor

ex. 9 g of Tungsten = ? atoms

conversion factors needed:

1 mole = 183.85 grams & 1 mole = 6.02 x 10 ²³ atoms

1 step problem

9 g X 1m / 183.85 g X 6.02 x 10 ²³ atoms / 1 m = 2.95x10²²atoms

2 step problem

Part A 9 g X 1m / 183.85 g = .04895 m

Part B .04895 m x 6.02 x 10 ²³ atoms / 1 m = 2.95x10²²atoms

10/21/02

Review

10/22/02

Mid Term this week

10/23/02

Mole Day Student Photos

10/24/02

No School

10/25/02

No School

10/28/02

Hand back Mid Terms

10/29/02

Start Electron Configuration

Atomic structure assignment
Use your textbook for resource or Here
and read about Electron Configuration.

Assignment: Write the Electron Configuration for these elements.
H through Ne plus Na, Cl, and Kr.
Use the table below for help. Help here Game

10/31/02

Practice Orbital notation and electron dot

11/01/02

For the next 2 weeks

Intro to Titrations. Review technique and start lab.

Try this: Titration demo 1

Titration photos

We will be working in lab for the next two weeks on titration

Part A will be to Practice How Close Was Klos (now Kleinschmidt )

Part B will be to identify an unknown acid.

11/19/02

Review

11/20/02

Titration quiz

11/21/02

Review:

Gas Laws Do problems given at this site.

or use textbook:

Chapter 18 page 355 Gases

Boyle's Law

Questions 1-4 page 358

Dalton's Law

Questions 5-6 page 361

Charles' Law

Questions 7-9 page 363

Combined Gas Law

questions 10-11 page 364

11/22/01

Work on Gas law problems

12/02/02

Honorable Burke visits Chem 3 with treats

hoping for a little extra credit on the quiz. No muffin, no extra credit.

12/14/01

Bring in water on Monday.

12/17/01

Start intro to Ground Water

Student photos testing water

Show video on Ground Water

Bring water for Monday

Test water for pH

12/18/01

Calcium Carbonate Test

12/19/01

Students are working on power point presentations

which will include class results of the data collected.

12/20/01

Students are working on power point presentations

which will include class results of the data collected.

12/21/01

Christmas Break see you next year

Iron and Nitrate test

Coliform Bacteria Test

Students are working on power point presentations

which will include class results of the data collected.

??/01

Look at petri dishes for pos/neg test results

??/01

Review for final.

??/01

Final Exam

earch the page for Assignments and Due dates Ex: 8/28/00 Main Page