January 10, 2014

AGENDA:1 – Bell Ringer 2 – Review HW3 – Cornell Notes:

Balancing Chemical Reactions

4 – Practice5 – BrainPop: Chemical

Equations

Today’s Goal:Students will be able to

balance chemical reactions.

Homework1. Balancing Chemical

Reactions Practice Problems

2. Next week is the last week before exams! So make sure to finish any missing work this weekend to turn in by next Friday at the LATEST!

Friday, January 10

Objective: Students will be able to balance chemical

reactions.

Bell Ringer:Classify the following reactions: (as

synthesis (S), decomposition (D), combustion (C), single-replacement (SR) or double-replacement (DR))

1. FeCl3 + NaOH Fe(OH)3 + NaCl

2. N2 + H2 NH3

3. Ag2O Ag + O2

4 MINUTES REMAINING…

Friday, January 10

Objective: Students will be able to balance chemical

reactions.

Bell Ringer:Classify the following reactions: (as

synthesis (S), decomposition (D), combustion (C), single-replacement (SR) or double-replacement (DR))

1. FeCl3 + NaOH Fe(OH)3 + NaCl

2. N2 + H2 NH3

3. Ag2O Ag + O2

3 MINUTES REMAINING…

Friday, January 10

Objective: Students will be able to balance chemical

reactions.

Bell Ringer:Classify the following reactions: (as

synthesis (S), decomposition (D), combustion (C), single-replacement (SR) or double-replacement (DR))

1. FeCl3 + NaOH Fe(OH)3 + NaCl

2. N2 + H2 NH3

3. Ag2O Ag + O2

2 MINUTES REMAINING…

Friday, January 10

Objective: Students will be able to balance chemical

reactions.

Bell Ringer:Classify the following reactions: (as

synthesis (S), decomposition (D), combustion (C), single-replacement (SR) or double-replacement (DR))

1. FeCl3 + NaOH Fe(OH)3 + NaCl

2. N2 + H2 NH3

3. Ag2O Ag + O2

1 MINUTE REMAINING…

Friday, January 10

Objective: Students will be able to balance chemical

reactions.

Bell Ringer:Classify the following reactions: (as

synthesis (S), decomposition (D), combustion (C), single-replacement (SR) or double-replacement (DR))

1. FeCl3 + NaOH Fe(OH)3 + NaCl

2. N2 + H2 NH3

3. Ag2O Ag + O2

30 seconds Remaining…

Friday, January 10

Objective: Students will be able to balance chemical

reactions.

Bell Ringer:Classify the following reactions: (as

synthesis (S), decomposition (D), combustion (C), single-replacement (SR) or double-replacement (DR))

1. FeCl3 + NaOH Fe(OH)3 + NaCl

2. N2 + H2 NH3

3. Ag2O Ag + O2

10 Seconds Remaining…

BELL-RINGER TIME IS

UP!

January 10, 2014

AGENDA:1 – Bell Ringer 2 – Review HW3 – Cornell Notes:

Balancing Chemical Reactions

4 – Practice5 – BrainPop: Chemical

Equations

Today’s Goal:Students will be able to

balance chemical reactions.

Homework1. Balancing Chemical

Reactions Practice Problems

2. Next week is the last week before exams! So make sure to finish any missing work this weekend to turn in by next Friday at the LATEST!

Cornell Notes

Topic: Balancing Chemical Reactions

Date: 1/10/2014

MgO Mg + O2

Reactants Products

Reflection

Question:

Why do we

balance chemical equation

s?

Things reactin

g

Things produc

ed

Cornell Notes (continued)

Law of Conservation of Mass/Matter =

=

=

Mass of reactant

s

Mass of product

s

# of each element of

the reactants

# of each element of

the products

Cornell Notes (continued)

Reactants___ MgO

Mg = 1 O = 1

Products___ Mg + ___ O2

Mg = 1 O = 2

Example:

x 2 = 2x 2 = 2

x 2 = 2x 1 = 2

2 2 1

Balanced Chem. Eqn. =2 MgO 2 Mg + 1 O2

= Mg= O +

Coefficients

Cornell Notes (continued)

“How to Balance” Steps:1. Draw a line between reactants &

products.2. Count up all atoms of reactants &

products.3. Determine multiplier (coefficient)

LCD (Lowest Common Denominator).4. Place multiplier (coefficient) in front

of compound.5. Repeat as necessary until all

elements are balanced.

Practice

Counting Atoms:

O2 O = 2

Fe2O3 Fe = 2O = 3

2 NaOH Na = 2O = 2H = 2

2 Ca(NO3)2 Ca = 2N = 4

O = 12

2 NaOH Na = 2OH = 2

…or… …or…2 Ca(NO3)2

Ca = 2NO3 = 4

Practice (continued)

Reactants___ Ag + ___CuCl2

Ag = 1 Cu = 1 Cl = 2

Products___ Cu + ___ AgCl

Ag = 1Cu = 1

Cl = 1

Example:

x 2 = 2x 1 = 1

x 2 = 2x 1 = 1

2 1 21

x 1 = 2

x 2 = 2

Reflection

In the summary section of your Cornell Notes, complete both of the following sentence strands in 5 minutes:

It is important to balance chemical equations because…

I can balance chemical reactions by…

BrainPop: Chemical Equations

http://www.brainpop.com/science/matterandchemistry/chemicalequations/