predicting products
DESCRIPTION
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 PresentationTRANSCRIPT
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Predicting Products
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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
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Agenda
• Warm Up• Predicting Products • Exit Ticket
• ANNOUNCEMENTS: WKSHT #4 is HW, Quiz TOMORROW, test on Tuesday (when you get back from break)
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Warm Up Sheet Return / Packets
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What is the difference between double and single replacement?
SINGLE REPLACEMENT DOUBLE REPLACEMENT
__Na + _MgCl2 __ NaCl + __Mg NaOH + H2SO4 Na2SO4 + H2O
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Double or Single?____Ba + ____AuSO4
____ PbSO4 + ____ AgNO3
____ KMnO4 + ____ ZnCl2
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Predicting Products – Single Replacement
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Predicting Products – Single Replacements
Definition: One element replaces another element
A +BC AC +B
Notes
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Who would have an easier time getting a date?
Or
If you were dating Jabba the Hut, would you replace it with Megan Fox ?
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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.
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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
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Example Problem:C. Could this reaction occur?
K + BaCl2 Ba + KCl
__________
Notes
Why?______________________________________________________________
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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
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• 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
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You Try!
Predict the products of the following reactions:
1. BaO + Rb
2. HgO + Na
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Predicting Products – Double Replacement
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Predicting Products – Double Replacement
Double Replacement: Elements switch partners
AB + CD AD + BC
Notes
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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
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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
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Partner Practice
2. CaSO4 + Mg(OH)2
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Partner Practice
3. __MgSO4 + __AgNO3
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Partner Practice
4. NaBr + Ca(OH)2
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Partner Practice
5. __Li2O + __NaNO3
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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!
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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.
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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:
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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
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Quiz Return
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Exit Ticket