.

9/26/1164 Balancing Equations Activity

10/15/2014

63 Balancing Equations Activity

10/15/2014

..

Starter:

Arrange molecules into an equation: 2 Ag, 2 AgCl, 2 Cl,

Application:

Balancing Act Ws

Turn in when complete

Connection:

How is balancing equations like something you have done in math?

Exit: 2 H + CO3 → H2O +2CO2 Draw out this equation in your journal. Draw the atoms. Is this balanced or unbalanced? What does this have to do with the conversation of mass?

Practice: Glue Balancing Act Practice here

October 15, 2014

AGENDA8.5 F.

I will be able to recognize whether a chemical equation

containing coefficients is balanced or not and

how that relates to the law of

conservation of mass by reading, and

writing while completing notes and

activity.

1 Starter2. Notes3. Activity 4. Exit

Date Lecture/ Activity/ Lab Page

Table of Contents

9/25 Test Review 39-409/29 Periodic Puzzles 41-42 9/30 Bohr Model Challenge 43-44 10/1 Wheres Al? 45-4610/2 Element Wanted Poster 47-4810/6 Molecules, Compounds, and Elements 49-5010/07 Build a Molecule Activity 51-52 10/8 Counting Atoms 53-54 10/09 Counting Atoms with Coefficients 55-5610/10 Chemical Formula Writing 57-58 10/13 Writing Chemical Formulas 59-60 10/14 Chemical Equations and the Conservation of Mass 61-6210/15 Balancing Act 63-64

Balancing Act

Na + Cl salt

Law of Conservation of Mass

Atoms are not ___________ or __________During a chemical reaction. Scientist know

that there must the ________ number of atoms on each _______ of the _________. To balance the chemical equation, you must add _________________ to the different parts of the equation. You cannot _______ or __________ subscripts.

created destroyed

sameside arrow

coefficientsadd

remove

Step 1: Determine the number of atoms for each element

Mg + O2 MgO

Mg = Mg=

O= O=

1

2

1

1

Step 2: Try to add Coefficients to the equation to get the same number of atoms on each side.

Mg + O2 MgO

Mg = Mg=

O= O=

1

2

1

1

22

2

22

Balanced!!!

Equation 1: Determine the number of atoms for each element

Ca + O2 CaO

Ca = Ca=

O= O=

1

2

1

1

Equation 1: Try to add Coefficients to the equation to get the same number of atoms on each side.

Ca + O2 CaO

Ca = Ca=

O= O=

1

2

1

1

22

2

22

Balanced!!!

Equation 2.

N2 + H2 NH3

N = N=

H= H=

2 1

2 3

2

2

6

3

6

Balanced!!!

Equation 3.

Cu2O + C Cu + CO2

Cu = Cu =

O= O=

C= C=

2 1

1 2

1 1

2

2

2

2

4

4

4

Balanced!!!

Equation 4.

H2O2 H2O + O2

H = H =

O= O=

2 2

2 3

2

4

4

2

4

4

Balanced!!!

.

9/26/1164 Balancing Equations Activity

10/15/2014

63 Balancing Equations Activity

10/15/2014

..

Starter:

Arrange molecules into an equation: 2 Ag, 2 AgCl, 2 Cl,

Application:

Balancing Act Ws

Turn in when complete

Connection:

How is balancing equations like something you have done in math?

Exit: 2 H + CO3 → H2O +2CO2 Draw out this equation in your journal. Draw the atoms. Is this balanced or unbalanced? What does this have to do with the conversation of mass?

Practice: Glue Balancing Act Practice here