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Chapter 6.1: Types of Chemical Reactions

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Warm-up

Balance these equations in your workbook (pg. 105, 1-6)

1) ____ N2 + ____ F2→ ____ NF3

2) ____ KClO3→ ____ KCl + ____ O2

3) ____ C12H22O11 + ____ O2→ ____ CO2 + ____ H2O

4) ____ CuSO4 + ____ Fe → ____ Fe2(SO4)3 + ____ Cu

5) ____ MgF2 + ____ Li2CO3→ ____ MgCO3 + ____ LiF

6) ____ H3PO4 + ____ NH4OH → ____ H2O + ____(NH4)3PO4

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Warm-up

Balance these equations in your workbook (pg. 105, 1-6)

1) ____ N2 + ____ F2→ ____ NF3

2) ____ KClO3→ ____ KCl + ____ O2

3) ____ C12H22O11 + ____ O2→ ____ CO2 + ____ H2O

4) ____ CuSO4 + ____ Fe → ____ Fe2(SO4)3 + ____ Cu

5) ____ MgF2 + ____ Li2CO3→ ____ MgCO3 + ____ LiF

6) ____ H3PO4 + ____ NH4OH → ____ H2O + ____(NH4)3PO4

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Warm-up

Balance these equations in your workbook (pg. 105, 1-6)

1) ____ N2 + ____ F2→ ____ NF3

2) ____ KClO3→ ____ KCl + ____ O2

3) ____ C12H22O11 + ____ O2→ ____ CO2 + ____ H2O

4) ____ CuSO4 + ____ Fe → ____ Fe2(SO4)3 + ____ Cu

5) ____ MgF2 + ____ Li2CO3→ ____ MgCO3 + ____ LiF

6) ____ H3PO4 + ____ NH4OH → ____ H2O + ____(NH4)3PO4

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12 12 11

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Balancing chemical equations is useful, but only if we already know

the reactants and products.

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Warm-up

Predict the products (as best as you can). Write your prediction down on a piece of paper.

CO2(s) + Mg(s)→ _____?

Dry ice: -78.5˚C

Full video: https://www.youtube.com/watch?v=NMZT2BAEtnc 6

Warm-up

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Warm-up

CO2(s) + Mg(s)→MgO(s) + C(s)

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Synthesis

Tearing things down

Decomposition

Other examples?

Synthesis and Decomposition

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Synthesis

Example:

Na + Cl2→ NaCl2 2

Synthesis and Decomposition

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Decomposition

Example:

CuCl2→ Cu+ Cl2

Synthesis and Decomposition

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Decomposition

Example:

2H2O → 2H2 + O2

Synthesis and Decomposition

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Synthesis

Decomposition

Synthesis and Decomposition Practice

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What type of reactions are these? Balance the equations.

1) ___HI → ___H2 + ___I2

2) ___S8 + ___H2→ ___H2S

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Replacement reactions always involve at least one ionic compound.

Single/Double Replacement

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Single Replacement

If A is a METAL:

What will the product(s) be?

a) A + BC

b) AB + C

c) AC + B

d) ABC

Single/Double Replacement

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Single Replacement

If A is a NON-METAL:

Single/Double Replacement

What will the product(s) be?

a) B + AC

b) B + CA

c) C + AB

d) C + BA

2 a + MgCl2→Mg + 2

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Single ReplacementIf A is a METAL:

If A is a NON-METAL:

Single/Double Replacement

Example:

Na + MgCl2→Mg + NaCl

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Double Replacement

Single/Double Replacement

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Single/Double Replacement

Example:

BaCl2 + 2NaF → BaF2 + 2NaCl

Double Replacement

Single/Double Replacement

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Single ReplacementIf A is a METAL:

If A is a NON-METAL:

Double Replacement

Single/Double Replacement

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Predict the Products:

lead (II) nitrate + potassium iodide → ??

https://www.youtube.com/watch?v=2EQznGPZY5A 23

Pb(NO3)2 (aq) + KI(aq)

PbI2(s) + KNO3(aq)

Precipitate: an insoluble solid ionic compound that often forms in double replacement reactions

Single/Double Replacement Practice

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What types of reactions are these? Balance the equations.

1) ___NaBr + ___Cl2→ ___Br2 + ___NaCl

2) ___Pb(NO3)2 + ___KI →

___KNO3 + ___PbI2

http://lorpub.gadoe.org/State%20of%20Georgia/GAVS%20Shared/Science/APChem_ChemicalReactions_Shared/APChem_ChemicalReactions_Shared2.html 25

Dance Analogy (Warm-up)

What reaction types are these?

Synthesis

DecompositionDouble Replacement

Single Replacement1

2

3

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Learning Objectives

After today’s lesson, you should be able to:

• Name and describe 6 different types of reactions

• Identify reactions based on chemical equations

• Predict the products of the 6 types of reactions based on reactants only

Neutralisation

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Neutralisation is a type of double replacement reaction. (Sometimes, salts are precipitates)!

Combustion

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CxHy + O2→ CO2 + H2O

Combustion

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Combustion

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CxHy + O2→ CO2 + H2O

Candle wax: C31H64

Discussion

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Why does water sometimes drip out from car tailpipes?

General Notes

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• Balance your equations!

• Beware diatomic elements! (H, I, Br, O, N, Cl, F)

- Decomposition

- Single replacement

I Bring Cookies For Our New Home

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Exit Slip (/5)

• Observations: Before, During, After (/1)

• Chemical Equation

– Reactants (/1)

– Products (/1)

– Balancing (/1)

• What type of reaction?

– Synthesis, Decomposition, Single Replacement, or Double Replacement? (/1)

Resources

Lots of videos on youtube! Some among many…

Most reaction types (missing neutralisation): https://www.youtube.com/watch?v=aMU1RaRulSo&t=194s

https://www.youtube.com/watch?v=2qX9MOQOmAM

Synthesis (lots of examples)

https://www.youtube.com/watch?v=X-yVwNeb0aI

Synthesis/decomposition (goes slowly) https://www.youtube.com/watch?v=XgRZjfLfWMY

Synthesis/decomposition (has cool demos) https://www.youtube.com/watch?v=yS8noHTIJ_E

Single/double replacement https://www.youtube.com/watch?v=zMHglxTCHyE

Combustion

https://www.youtube.com/watch?v=sgHDzTH_GyU

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Resources

Khan Academy!

Single Replacement:

https://www.khanacademy.org/science/chemistry/chemical-reactions-stoichiome/types-of-chemical-reactions/a/single-replacement-reactions

Double Replacement:

https://www.khanacademy.org/science/chemistry/chemical-reactions-stoichiome/types-of-chemical-reactions/a/double-replacement-reactions

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