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Predicting Products. Warm Up. 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? - PowerPoint PPT Presentation
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Predicting Products
Warm UpWKSHT #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 DOUBLE REPLACEMENT
__Na + _MgCl2 __ NaCl + __Mg NaOH + H2SO4 Na2SO4 + H2O
Double or Single?____Ba + ____AuSO4
____ PbSO4 + ____ AgNO3
____ KMnO4 + ____ ZnCl2
Predicting Products – Single Replacement
Predicting Products – Single Replacements
Definition: One element replaces another element
A +BC AC +B
Notes
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
Example Problem:C. Could this reaction occur?
K + BaCl2 Ba + KCl
__________
Notes
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
– Na2S + K K2S + Na
• Predict the products of the following reactions:Ex. KF + Li
Single Replacement – Predicting the Products
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
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
Notes
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 Ticket1. Consider this incomplete chemical
equation: Ba + CuCl2 What are the products of this
equation?A.BaCl2 and CuCl2
B.BaCuCl2 and BaC.BaCl2 and CuD.BaCu and Cl2
BIG QUIZ TOMORROW!!WORKSHEET #4 is HOMEWORK!
Icy/Hot Lab1. 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 Lab1. 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:
ConsensusLaw 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