Law Conservation of Mass

Ms Bologna

Monday: Chickasaw Challenge

• 1. Draw a diagram that shows what happens to the molecules in chemical reaction.

• 2. What is one goal you are setting for yourself this week

• 3. Look at the question to the right: determine the questions that you would need to ask yourself in order to answer this question.

Which substance is classified as an element?A. NaCl

B. COC. H2O

D. Li

Class Pledge• We Will…– Work Hard NOT because we have to but because

we WANT to for our own success and future.• We Can…

• Achieve excellence through hard work and motivation

• We All…– Work together to reach our greatest potential

• Our Future…– Is college bound!!!

• SWBAT practice balancing a Chemical Equation

• Extension: SPI 0807.9.10 Identify the reactants and products of a chemical reaction.

Daily Objective

Assessment Reflection!

• 1. Answer the assessment reflection questions:– What was your initial reaction to your score?– What did you do to get this score?– What actions are you going to take next time to

improve this score?– What is all the numbers that you got wrong.

• Use your graphs to track your data

Rapid Review

• Who are you? Reactant or Product?• - Silently go stand at the correct

point in the equation

__Mg + __Mn2O3 --> __MgO + __Mn

Balancing Equations!

• Whatever elements I start with I MUST end with.

• No new elements should be on the products side

• The Big Number in front is distributed to each. The small number only applies to that element.

Balancing Equations

• The Same # of Elements needs to be on Each Side!

• Create a Chart to help you

How To Balance!

• Step 1: Draw A box around all of the chemical formulas

• Step 2: Make a list of all the elements on the reactant side and how many there are

• Step 3: Write numbers in front of each box until it is balanced.

NaCl + __BeF2 --> __NaF + __BeCl2

Example 2: Together

Fe + Cl2 ==> FeCl3

Partner Try

Zn + HCl ==> ZnCl2 + H2

You Try!

H2 + O2 ==> H2O

Again

2Al + O2 ---> Al2O3

Activity: Glencoe Virtual Lab

• Balancing Equation

• http://glencoe.mcgraw-hill.com/sites/0078779626/student_view0/unit5/chapter21/virtual_lab.html

Tuesday: Chickasaw Challenge

• 1. Create a series of steps or questions that you could follow in order to solve a density problem!

• 2. What is Mass again? What are the units that we use for mass? What is the tool that we use?

• 3. Balance the following equation

Wednesday: Chickasaw Challenge

• 1. Write a Step by step process for using a triple beam balance?

• 2. What is the Major difference between Mass and Volume?

• 3. Identify the Reactants and Products in the Equation.. Attempt to balance the following chemical equation:

NaF + ____ Br2 ____ NaBr + ____ F2

Class Pledge• We Will…– Work Hard NOT because we have to but because

we WANT to for our own success and future.• We Can…

• Achieve excellence through hard work and motivation

• We All…– Work together to reach our greatest potential

• Our Future…– Is college bound!!!

• SW analyze, define, and demonstrate the Law of Conservation of Mass

• SPI 0807.9.11 Recognize that in a chemical reaction the mass of the reactants is equal to the mass of the products (Law of Conservation of Mass).

Daily Objective

Rapid Review: Beach Ball!!

• Are you in a hot seat??

Law of Conservation of Mass.

• Matter cannot be created nor destroyed!• In All Reactions: Chemical and physical .. What

ever I start with I am going to end with

Expanding our knowledge:

The Law of Conservation of Mass• In a chemical change, the mass of the

reactants at the start is equal to the mass of the products.

- Page 55

reactants = product

43.43 g Original mass = 43.43 g Final mass

Example 1

I have 2 grams of CH4 and 8 grams of 2O2. What is the total mass of the products?

Example 2

I have _____ grams of CH4 and 8 grams of O2. The products have a total mass of 30 g? What is the mass of CH4?

You Try

• H + O2 2H2O

• You have 6 grams of H and 3 grams of O2. What is the mass in grams of H2O?

Stop and Jot

Take a minute to sum up in your own words what the law of conservation of mass is. Explain it to your partner. Critique each others answers what was correct about the answers? What needs some adjustment.

Daily Preview!

What Happens if Some of the Matter is Missing?

Complete the demonstration..

• 1. What are the signs a chemical change occurred.?• 2. Where do you think that the remainder of the mass

went?

What are possible explanations for Missing Matter?

• Evaporated into a gas• Some fell out during the

experiment. • Inaccuracy in initial measurement

Check for Understanding

• 1. Write one multiple choice question based on what we learned today. Be sure that it is accurate! – Ex. Which of the following is NOT true about the

law of conservation of mass?

• Switch the question with a partner when finished and be prepared to share.

Today’s Choice:

• 1. Work Sheet: Law of Conservation of Mass• 2 Write a Letter From Reactants to Products

that explains why it is impossible for you to loose weight .

• Create a Brochure with 3 pages: Reactants, Products, and Law of Conservation of Mass.

Practice Makes Perfect and Lab Time!!

• Recap!!– How to find the mass??

Groups of 4

• Reader: responsible for reading the directions step by step to the rest of the group

• Materials Organizer: gathers and cleans up all of the supplies. Controls the TBB

• Recorder 1: Makes sure to record all the necessary information

• Recorder 2: Makes sure that all the necessary information is done

• Leader: Only able to ask me questions, responsible for student behavior and on-task.

Closure.

• Class Discussion• 3 things that I learned today• 2 things I am still confused about• 1 question that I still have.

Thursday: Chickasaw Challenge

• Justify each answer choice:

Which procedure best represents the Law of Conservation of Mass?• F. evaporating salt water leaves 5

grams of salt • G. burning 2 kilograms of wood leaves

0.4 kilogram of ash • H .using filter paper to separate 2

grams of solid from 10 grams of water• J. combining 2 grams of copper and 4

grams of sulfur to produce 6 grams of copper sulfate

What occurred in this investigation?a. The reaction produces heat, which causes

the plastic of the balloon to soften and change shape.

b. The reaction in the container produces gas, which causes the balloon to inflate.

c. The outside air pressure pushes on the container and forces air inside the balloon.

d. The air molecules from the container move into the balloon and form a solid substance.

Class Pledge• We Will…– Work Hard NOT because we have to but because

we WANT to for our own success and future.• We Can…

• Achieve excellence through hard work and motivation

• We All…– Work together to reach our greatest potential

• Our Future…– Is college bound!!!

• SW analyze, define, and demonstrate the Law of Conservation of Mass through a laboratory experiment.

• SPI 0807.9.11 Recognize that in a chemical reaction the mass of the reactants is equal to the mass of the products (Law of Conservation of Mass).

Daily Objective

Practice

• ____ N2 + _____ O2 _____ N2O 5.␣

• 8 grams of N2 and 10g O2

• _____ HgO _____ Hg + _____O2• 3 grams oxygen and 6 of mercury.

Beach Ball!

• If you catch the ball you must answer the problem that your thumb lands on OR define the vocabulary word!

Real Talk with MS. B

• 1. How about 3 hand signals or songs that Ms. Bologna has taught you to remember the material.

• 2. Today’s guest is going to explain the steps to balancing an equation.

• 3. What is the Law of Conservation of Mass?

Stations 1:

• 1: Practice the Law of Conservation of Mass• 2. Around the World• 3. Computer Practice• 4. TCAP Prep Book: Choose one of the marked

pages. Read the Chapter and Answer the Question

• 5. Review Time with Ms. B!

Complete 2!!

• 1. Zone Zero so you can prepare for the assessment.

• 2. Ask Two Before me. • 3. Make sure that you complete the around

the world Stations• 4. Teach, Encourage, and Support One

another.

8-8: Index Card Time: To help Study.

• Cut and Paste the Problems and Paste them on the front of the index cards.

• On the rest of the cards write– Reactant– Product– Chemical Equation– Mass

• One the RED CARD:–List what is difficult about the

questions• One Green Card–What questions are you able to

answer. What makes it easy?

Groups of 4

• Reader: responsible for reading the direction step by step to the rest of the group

• Materials Organizer: gathers and cleans up all of the supplies

• Recorder 1: Makes sure to record all the necessary information

• Recorder 2: Makes sure that all the necessary information is done

• Leader: ONLy able to ask me questions, responsible for student behavior and on-task.

Closure.

• Class Discussion• 3 things that I learned today• 2 things I am still confused about• 1 question that I still have.

Friday: Chickasaw Challenge• Two students added a piece of zinc to a solution of

hydrochloric acid in an open beaker. The mass of the products was found to be less than the total mass of the reactants. Which of the following statements best explains the loss of mass?

• A Zinc metal is more dense than the acid. • B The chemical activity of the acid destroyed metal atoms.• C A gas was released during the reaction.• D Some of the zinc atoms failed to react.Create TWO questions based on the law of Conservation of Mass

Class Pledge• We Will…– Work Hard NOT because we have to but because

we WANT to for our own success and future.• We Can…

• Achieve excellence through hard work and motivation

• We All…– Work together to reach our greatest potential

• Our Future…– Is college bound!!!

• SWBAT show me what they know!!

• SPI 0807.9.10 Identify the reactants and products of a chemical reaction..

Daily Objective

Pace Makers of the Week

• 8-7: Artavion Gloston• 8-6: Alicia R.

• 8-8: Lakeytha Mills

Rapid Review

• Fill in the Empty Space!

__Mg + __Mn2O3 --> __MgO + __Mn

Switch, Switch, Solve!

Daily Preview!

Testing Procedures

1. Zone Zero or Receive a Zero2. Extra Credit when you are finished test on

the table3. No Ms. B!!4. All heads are facing forward5. Raise your hand and wait to be called on