predicting products

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