Honors Chemistry
Arnoldi Course Selection!
Honors Chemistry
Reactions
Lesson Plans
Day One
No HW Check
I. Introduction Note Packet
A. Definitions
1. Reaction
2. Reactant
3. Product
4. Chemical Equation
5. Word Equation
6. Formula Equation
7. Coefficients
a. What do coefficients represent?
In general…
A mole is a number …
Specifically, …
b. Example: 2 Na + _Cl2 ( 2 NaCl
8. Energy in Equations
a. Remember …
(i) Endothermic
(ii) Exothermic
b. How do we show energy in equations?
(i) Endothermic
(ii) Exothermic add energy on the product / right side
9. Phases
Examples
10. Other Symbols you may see in an equation:
B. Converting Sentences into equations and vice versa.
C. Identifying pieces of an equation.
PROMPT ONE TOP Packet
II. Balancing Chemical Equations
A. Why do we balance chemical equations?
B. Some preliminary information that you need to know…
C. So, what are we really balancing?
1. TOTAL ATOMS are balanced in equations.
2. INDIVIDUAL TYPES of atoms are balanced in equations.
3. MASSES are also balanced in equations.
4. BUT…
5. HOWEVER…
D. Steps for Balancing Equations
1. Make a Chart
2. The number of atoms on the left …
3. Add or change coefficients (never subscripts).
4. Helpful Hints
a. Polyatomic Ions…
b. Water…
c. Combustion Equations
Examples:
COMPLETE PROMPT TWO NOW
HOMEWORK: Homework Packet
Day Two
HW Check
III. Types of Reactions
A. Synthesis
1. Basic Equation
2. Recognize by:
3. Examples:
B. Decomposition
1. Basic Equation
2. Recognize by:
3. Examples:
C. Single Replacement
1. Basic Equation
2. Recognize by:
3. Examples:
D. Double Replacement
1. Basic Equation
2. Recognize by:
3. Examples:
E. Combustion
1. Basic Equation
2. Recognize by:
3. Examples
COMPLETE PROMPT THREE NOW
IV. Completing Reactions
A. Initial Thoughts
1. Some reactions happen and some don’t.
a. For synthesis and combustion…
b. For decomposition, …
c. For single replacement…
d. For double replacement reactions…
COMPLETE PROMPT FOUR NOW
HOMEWORK:
Day Three
HW Check
IV. Completing Reactions, cont.
B. Steps for Completing Synthesis Reactions
1. Determine the product formula.
If ionic…
If covalent …
2. Add coefficients to balance the equation
3. Add phases as is possible
a. Elements alone
b. Ionic Compounds
c. Covalent Compounds …
d. If water is present…
Examples:
C. Steps for Completing Decomposition Reactions
1. First, ask yourself…
2. If energy is present…
Things to watch for…
a. Do you have a diatomic element present?
b. Metal Carbonate (
c. Metal Chlorate (
d. Hydrates…
3. Add coefficients to balance the equation
4. Add phases as is possible
Examples:
D. Steps for Completing Combustion Reactions
1. All combustion reactions require oxygen to react, O2.
2. All (organic) combustion reactions produce …
3. After you write the products down…
4. In terms of phases…
a. The oxygen and carbon dioxide are obviously gases.
b. So is the water… why?
5. DO NOT CONFUSE …
Examples:
COMPLETE PROMPT FIVE NOW
HOMEWORK
Day Four
HW Check
(if running behind, pick up any old notes here)
IV. Completing Reactions, cont.
E. Steps for Completing Single Replacement Reactions
1. First, assign oxidation numbers…
2. Identify who the loner on the reactant side is trying to replace…
3. BUT … not all single replacement reactions occur!
a. DEMO
b. So, how can we predict if a single replacement reaction will occur?
4. If the reaction occurs…
a. Who got kicked out?
b. Who is now joined?
5. Balance the equation using coefficients.
6. Add phases as is possible.
Examples
COMPLETE PROMPT SIX NOW
HOMEWORK:
(Review) Review Packet
Day Five
HW Check
IV. Completing Reactions, cont.
F. Double Replacement Reactions
1. First, assign oxidation numbers…
2. In this case, there is no loner…
a. Remember, …
b. Criss cross your oxidation numbers, …
3. That’s right. Your potential products. Remember…
a. DEMO
b. So, how can we predict if a double replacement reaction will occur?
4. If the reaction does occur, …
Examples:
COMPLETE PROMPT SEVEN NOW
5. One more thought about completing double replacement reactions
6. Last thing…
Example:
V. Net Ionic Equations
A. Recall that double replacement reactions don’t always occur…
B. Steps for Writing Ionic Equations
1. Complete the molecular equation for the replacement reaction.
2. Separate all aqueous substances into ions.
a. Be sure to account for all ions!
b. You need to show these separate species as ions …
c. Keep the (aq) phase for the ions.
d. Diatomics do NOT come into play …
3. Eliminate all common ions.
4. Reduce equation if needed.
COMPLETE PROMPT EIGHT NOW
Examples:
HOMEWORK
Day Six
Types of Reactions Lab Day One Set, Write, Proc
Homework: Lab Due One Week
Day Seven
Types of Reactions Lab Day Two
Homework: (lab)
Review due tomorrow
Day Eight
HW Check Review Keys
Practice Test Practice Test and Key
Day Nine
Test Test
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