monday, october 26 - deer valley unified school district october 26 today – write in your agenda...

Monday, October 26 Today – write in your agenda

Monday – finish pH poster – due Tues Wednesday – Chemical reaction questions – due Thurs

Reminders: -Signed conference sheets due to 2nd hour teachers by Wed -Report cards are due to 2nd hour teachers by Wednesday -Please take home extra materials from Zoom project -Red Ribbon week Monday – PJs Tuesday – sports jersey or t-shirt Wednesday – Red Thursday – hats Friday – superhero

Mission: We will be incredible science students.

How can matter be measured, described and changed? Today we will… -Identify chemical properties of matter including pH

Open to your Chemistry section

Add to your table of contents

Date Title Page #

10/14 Matter, mass, volume & density notes 1

10/15 Volume, density and solubility 2

10/15 Solubility lab 3

10/19 States of Matter 4

10/20 Elements, compounds and mixtures 5

10/26 Properties of Matter Quiz 6

10/26 pH notes (I will give you these pages)

7

pH

• Read pages 125-131

• When done, complete reading guide (notes)

H+ 0H- (hydroxide)

Less than 7 Greater than 7

Sour Bitter

Burning or itching Slippery

Carbonates (bubbling), metals

Oil and grease

Red Blue

Pink Green

milk soap

Lemon, hydrochloric acid (HCl)

Sodium hydroxide (NaOH)

When acids and bases react with each other, the H+ ions from the acid and the OH- ions from the base join together and form H2O (water). The other ions join together and form a salt molecule.

Acids and bases neutralize each other (this means they bring the pH closer to 7) . For example, if you mixed an acid with a pH near 5 with a base with a pH near 9, they would end up with a pH near 7.

pH Poster

Create a poster (regular sized paper) that turns an acid and a base into cartoon characters and that shows at least 6 differences between acids and bases. Be creative.

Lemon guy (acid)

A Antacid guy

(base)

I will neutralize you!

Tuesday, October 27

Please write the date and question

10/27: If you have a lemon with a pH of 3, which of the following could be used to neutralize it? Explain your answer. A-Orange with a pH of 4 B-Water with a pH of 7 C-Baking soda with a pH of 9

Tuesday, October 27

Please write the date and question

10/27: If you have a lemon with a pH of 3, which of the following could be used to neutralize it? Explain your answer. A-Orange with a pH of 4 B-Water with a pH of 7 C-Baking soda with a pH of 9

C – an acid (which has low pH) must be neutralized with a base (which has a pH over 7)

Reminders: -Signed conference sheets due to 2nd hour teachers tomorrow -Report cards are due to 4th hour teachers tomorrow -Please take home extra materials from Zoom project -Red Ribbon week Wednesday – Red Thursday – hats Friday – superhero

Mission: We will be incredible science students.

How can matter be measured, described and changed? Today we will… -Identify chemical properties of matter including pH -Identify evidence that chemical reactions have occurred

pH Poster

A

Oh no! My pH is below neutral!!

NEUTRAL

Please get out your homework (pH poster) Share it with your table And pick 1 to share with class

Ha!! I’ve got you! My pH is above neutral!!

14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Predictions

1.Find your partner

2.Sit with your partner

3.Complete the predictions paper. Write down your own initial definitions of “physical change” and “chemical change” and then predict which type of change you think each example is. Explain WHY.

Open to your Chemistry section

Add to your table of contents

Date Title Page #

10/20 Elements, compounds and mixtures 5

10/26 Properties of Matter Quiz 6

10/26 pH notes 7

10/27 Changes observation log (I will give you this page)

8

Lab Safety

• Do not put anything in your mouth

• Wear safety googles when instructed to

• Clean up messes

Copy this on the back of page 7 Solution Red Litmus Blue Litmus Acid or Base

Baking soda

7up

Vinegar

Dish soap

Tap water

Alkaseltzer

Borax and water

Lemon juice

Copy this on the back of page 7 Solution Red Litmus Blue Litmus Acid or Base

Baking soda

Blue Blue

7up

Red Red

Vinegar

Red

Red

Dish soap

Blue

Blue

Tap water

Red

Blue

Alkaseltzer

Blue

Blue

Borax and water

Blue

Blue

Lemon juice

Red

Red

Base

Base

Base

Base

Acid

Acid

Acid

Neutral

Vinegar + baking soda

Cutting index card

Procedure: Person A gets flask, beaker, baking soda & vinegar, B rinses out flask and beaker and puts them back, C gets goggles for everyone at table, D puts goggles back & wipes them

Everyone at your table must wear goggles for this activity. When you are done, wipe them and put them back into the box. Add to your observation log (page 8): Vinegar + baking soda 1. Get a flask and fill it with 75mL of water. 2. Add 1 teaspoon of baking soda to the water and mix it up. 3. Pour half of your cabbage juice into the flask. Record your results. 4. Get a beaker and fill it with 75mL of vinegar. 5. Pour the other half of your cabbage juice into the vinegar. Record your results on your observation log. 6. Slowly pour the vinegar into the flask that has the baking soda

solution. Record your results on your observation log. 7. Rinse these out and put them back.

Wednesday, October 28

Please write the date and question

10/28: When an acid and a base react, what are the 2 products that are formed? (use your pH notes)

Wednesday, October 28

Please write the date and question

10/28: When an acid and a base react, what are the 2 products that are formed? (use your pH notes)

Salt and water

Reminders: -Signed conference sheets due to 2nd hour teachers today -Report cards are due to 4th hour teachers today -Please take home extra materials from Zoom project -Red Ribbon week Thursday – hats Friday – superhero

Mission: We will be incredible science students.

How can matter be measured, described and changed? Today we will… -Identify evidence that chemical reactions have occurred

Lab Safety

• Do not put anything in your mouth

• Wear safety googles when instructed to

• Clean up messes

Vinegar + baking soda

Cutting index card

Procedure: Person A gets flask, beaker, baking soda & vinegar, B rinses out flask and beaker and puts them back, C gets goggles for everyone at table, D puts goggles back & wipes them

Everyone at your table must wear goggles for this activity. When you are done, wipe them and put them back into the box. Add to your observation log (page 8): Vinegar + baking soda 1. Get a flask and fill it with 75mL of water. 2. Add 1 teaspoon of baking soda to the water and mix it up. 3. Pour half of your cabbage juice into the flask. Record your results. 4. Get a beaker and fill it with 75mL of vinegar. 5. Pour the other half of your cabbage juice into the vinegar. Record your results on your observation log. 6. Slowly pour the vinegar into the flask that has the baking soda

solution. Record your results on your observation log. 7. Rinse these out and put them back.

Questions to discuss: Answer on the back of page 7

1. What did the color of the cabbage juice tell you about the pH of the vinegar and baking soda?

2. What did the color change when you combined them tell you about the pH of the new solution?

3. Was this a physical or a chemical change? What evidence supports your answer?

Steel wool and air

Antacid and water

Look at temperature

Vocabulary

Corrosion: the gradual destruction of materials (usually metals) by chemical reaction with its environment

Milk and Red Bull

Vocabulary

Precipitate: a solid that forms as the result of a chemical reaction

Nail and saltwater

Corn starch and iodine

Open to your Chemistry section

Add to your table of contents

Date Title Page #

10/20 Elements, compounds and mixtures 5

10/26 Properties of Matter Quiz 6

10/26 pH notes 7

10/27 Changes observation log 8

10/28 Chemical reactions notes (I will give you this page)

9

Thursday, October 29

Please complete the paper that I gave you and turn it in to the black basket on center table when done. You have 10 minutes.

Reminders: -Clean up after lunch -Red Ribbon week Friday – superhero

Mission: We will be incredible science students.

How can matter be measured, described and changed? Today we will… -Identify evidence that chemical reactions have occurred

Milk and Red Bull

Vocabulary

Precipitate: a solid that forms as the result of a chemical reaction

Steel wool (+vinegar) + air

1. Place the steel wool in the vinegar for one minute. 2. While the wool is in the vinegar, get a beaker and a thermometer. Put the thermometer in the beaker and record the initial temperature. 3. Get the steel wool out. The vinegar has removed a protective coating and now iron is exposed. Dry it off. 4. Put the steel wool into the beaker and wrap it around the thermometer. 5. Cover it with aluminum foil. 6. Record the temperature and any observations after 10 minutes.

Clean up

• Put the steel wool into the large pink bowl on center table.

• Rinse out the beaker.

• Return the beaker and thermometer to the middle table.

• Put foil in recycling.

Nail and saltwater

1. Add 50 mL of water to your cup.

2. Get 10mL of salt from the back counter. Mix that into the beaker or flask.

3. Record observations of your nail (I will pass these out).

4. Put your nail into the saltwater solution and place the cup on the counter.

Steel wool and air

Antacid and water

Look at temperature

Vocabulary

Corrosion: the gradual destruction of materials (usually metals) by chemical reaction with its environment (aka rusting)

Use chemical interactions to complete

Chemical Reactions Notes (pg 9)

Friday, October 30

Please write the date and question

10/30: List 2 things that you could use for evidence to show that the steel wool reacting with air was a chemical change.

Friday, October 30

Please write the date and question

10/30: List 2 things that you could use for evidence to show that the steel wool reacting with air was a chemical change.

The temperature increased and there was corrosion (rusting)

Please turn you warm up into the basket on center table. Make sure that your name is on it. Staple if it’s more than 1 page.

Reminders: -Clean up after lunch -Bring parachute supplies on Monday -Please take AZ Merit and Future Freshmen Flyer home to your parents

Ace Kickoff

• Goal – build a parachute that will stay in the air for the longest period of time

• Must have parachute, strings of some sort, and something attached

Have supplies on Monday

Page 69

A chemical reaction produces ______________ substances by changing the way in which _______________ are arranged. In a chemical reaction,________________ between atoms are broken and new ________________ form between different atoms.

new

atoms

bonds

bonds

Substances present at the beginning of a reaction

The substances formed from a chemical reaction

Methane + oxygen Carbon dioxide + water

Page 72

Evidence of chemical reactions:

1.

2.

3.

4.

Color change (including rust from corrosion)

Formation of a precipitate (solid formed from reaction of 2 liquids)

Formation of a gas (bubbling sometimes)

Temperature change

A new compound is formed by the combination of simpler reactants

A reactant breaks down into simpler products

One reactant is always oxygen and another often contains carbon and hydrogen – forms CO2 and H20

N2 + 02 -> 2NO2

2H2O -> 2H2 + O2

CH4 + 2O2 -> CO2 + 2H2O

A reaction in which energy is released. Feels hot. Temperature increases.

A reaction in which energy is absorbed. Feels cold. Temperature drops.

Steel wool reacting with air

Antacid reacting with water

Dry ice going through sublimation

Dry Ice

https://www.youtube.com/watch?v=kLO5SJ2uxEE

Water boiling

Paper burning

Video https://www.youtube.com/watch?v=WG8fIplQeDY

*3 things that you hear that we have talked about in the past 2 weeks

*3 things that you hear that you didn’t know about

*3 things that are interesting or surprise you

As a pod at your table (using jobs) answer this question: Why is chemistry important to our lives? What are some ways that it can help us (give 2 examples)