Predicting Products
Warm Up
WKSHT #3 OUT!!
1. What is the formula
of calcium chloride?
2. Does AuSO4
have a polyatomic
ion? What is it?
3. What is the
difference between
double and single
replacement?
EQ: What are the rules for
predicting the products of
rxns?
HOT Q1: When will a single
replacement rxn occur?
HOT Q2: How do I predict
the product of single
replacement rxns?
HOT Q3: How do I predict
the product of double
replacement rxns?
• Students will identify the
characteristics of an
endothermic reaction
Agenda
• Warm Up
• Predicting Products
• Exit Ticket
• ANNOUNCEMENTS: WKSHT #4 is HW, Quiz
TOMORROW, test on Tuesday (when you get back
from break)
Warm Up Sheet Return / Packets
What is the difference between
double and single replacement?
SINGLE REPLACEMENT
__Na + _MgCl2 __ NaCl + __Mg
DOUBLE REPLACEMENT
NaOH + H2SO4  Na2SO4 + H2O
Double or Single?
____Ba + ____AuSO4 
____ PbSO4 + ____ AgNO3 
____ KMnO4 + ____ ZnCl2 
Predicting Products –
Single Replacement
Notes
Predicting Products – Single Replacements
Definition: One element replaces another element
A +BC  AC +B
Who would have an easier
time getting a date?
Or
If you were dating Jabba the Hut, would
you replace it with Megan Fox ?
Lithium (Li) is like Meghan Fox. She will
always be able to get a date with another
element.
Jabba the Hut is like Mercury (Hg). If he
gets a date he can easily be replaced.
A. Elements higher on the
activity series can replace
elements lower on the
chart.
- Ex: Lithium (Li) can
replace Mercury (Hg)
B. Elements lower on the
chart CANNOT replace
elements higher on the
chart.
- Ex: Nickel (Ni) cannot
replace Sodium (Na)
Notes
C. Could this reaction
Example
occur?
Notes
Problem:
K + BaCl2  Ba + KCl
__________
Why?
________________
________________
________________
Single Replacement Partner Problems
• With your partner, decide if
the following reactions will
occur.
1. Rb + LiF  RbF + Li
1. BaF2 + Mg  MgF2 + Ba
1. Na2S + K  K2S + Na
Single Replacement – Predicting the Products
• Predict the products of
the following reactions:
Ex. KF + Li 
STEPS:
1.Find the nonmetal
element
1.Will the nonmetal
element trade up? (Look
at activity series)
1.If the reaction will
occur, swap, drop, and
chop it to make the new
compound
You Try!
Predict the products of the following reactions:
1. BaO + Rb 
2. HgO + Na 
Predicting Products –
Double Replacement
Notes
Predicting Products – Double Replacement
Double Replacement: Elements
switch partners
AB + CD  AD + BC
Notes
Predicting Products – Double Replacement
A. You can predict products if you follow the general
equation.
A B + C D
A D
+ C B
CaCl2 + AgNO3 Ca(NO3)2 + AgCl
B. You will also have to use your PToE and the
polyatomic ion chart to swap, drop, and chop
charges
Double Replacement Sample Problems
1. __NaOH + __KNO3
STEPS:
1. Write the general
equation above the
reaction
2. Swap, drop and chop
charges to make the
products
Partner Practice
2. CaSO4 + Mg(OH)2
Partner Practice
3. __MgSO4 + __AgNO3 
Partner Practice
4. NaBr + Ca(OH)2 
Partner Practice
5. __Li2O + __NaNO3 
Exit Ticket
1. Consider this incomplete
chemical equation:
Ba + CuCl2 
What are the products of this
equation?
A.BaCl2 and CuCl2
B.BaCuCl2 and Ba
C.BaCl2 and Cu
D.BaCu and Cl2
BIG QUIZ TOMORROW!!
WORKSHEET #4 is HOMEWORK!
Icy/Hot Lab
1. Grab two baggies for your table.
2. With a marker label one Baking Soda, the other
Yeast.
3. Fill the Baking Soda baggie with a few drops of
Vinegar. Shake.
4. Fill the Yeast baggies with a few drops of
Hydrogen Peroxide. Shake it like a Polaroid picture.
5. DESCRIBE IN DETAIL WHAT HAPPENS IN EACH
BAGGIE.
Hot Pack/ Cold Pack Mini Lab
1. Grab two baggies for your table.
2. With a marker label one Baking Soda, the other Yeast.
3. Fill the Baking Soda baggie with a few drops of
Vinegar. Shake.
4. Fill the Yeast baggies with a few drops of Hydrogen
Peroxide. Shake it.
DATA/ANALYSIS: Describe in detail what happened in
each reaction.
• Vinegar & Baking Soda:
•
Hydrogen Peroxide & yeast:
Consensus
Law of Conservation of Energy:
What two types of energy have we learned about so far?
3rd Type: Chemical energy = energy stored in chemical bonds
• EXOTHERMIC (energy EXits the system)
– Chemical energy stored in the reactants is converted to thermal
energy
– Thermal energy leaves the system (gives off energy)  feels
warm or hot
• ENDOTHERMIC (energy goes INTO the system)
– Thermal energy from the system is absorbed during the rxn 
feels cold!
– Thermal energy is converted to chemical energy and is then stored
in the products
Quiz Return
Exit Ticket