Warm Up (Element or Compound)

Identify the following as either an element or a compound:

Cl2 CuO O2 S8 Na2S

SO3 P4 N2 CO2 MgF2

REMINDER!

Element: a substance that contains only one type of atom

Compound: a substance that is composed of atoms of different elements

NOW RE-CHECK YOUR ANSWERS

Warm Up (Element or Compound)

Identify the following as either an element or a compound:

Cl2 CuO O2 S8 Na2S

SO3 P4 N2 CO2 MgF2

Chemical Reactions

Thousands of reactions

But we are only concerned with The “Basic 5 Types”

What is happening in common for all of the following

reactions? 2 Na  +  Cl2  →    2 NaCl

N2 +  3 H2  →    2 NH3

2 Mg  +  O2  →    2 MgO

C  +  O2  →    CO2

P4  + 6 Cl2  →    4 PCl3

Synthesis

Two or more simpler

substances come together to form a new

substance A + B A

B

Synthesis

Always makes one product out of multiple reactants.

+

Synthesis

When magnesium is burned in the presence of oxygen gas, magnesium oxide is formed.

Magnesium + oxygen magnesium oxide

2Mg + O2 2MgO

What is happening in common for all of the following

reactions? 2 HgO  →    2 Hg  +  O2

2 H2O  →    2 H2  +  O2

2 NaCl  →    2 Na  +  Cl2

CaCO3  →    CaO  +  CO2

H2SO4  →    H2O  +  SO3

Decomposition

A compound breaks down into two or

more simpler substances

AB A + B

Decomposition Always takes one reactant and

breaks apart into simpler materials.

+

+ +

+

Decomposition

When hydrogen peroxide is in the presence of sodium iodide, it breaks down into water and oxygen gas.(electrolysis of water)

2H2O2 2H2O + O2

Hydrogen peroxide

Sodium iodide

Water + oxygen

Fe  +  CuSO4  →    FeSO4  +  Cu

Cl2  +  2 NaBr  →    2 NaCl  +  Br2

Zn  +  2 HCl  →    ZnCl2  +  H2

Mg  +  H2O  →    MgO  +  H2

What is happening in common for all of the following

reactions?

Single replacement

One element replaces another element in a compound

AB+ C CB

+ A

Single Replacement

A single element replaces a positive or negative ion in a compound.

Single Replacement

When copper reacts with silver nitrate, silver and copper nitrate are produced.

Copper + silver nitrate silver + copper nitrate

Cu + AgNO3 CuNO3 + Ag

?? Activity series ??

What is happening in common for all of the following

reactions? NaCl  +  AgNO3 →   NaNO3  +  AgCl

BaCl2  +  Na2 SO4  →    2 NaCl  +  BaSO4

2 HCl  +  FeS  →    FeCl2  +  H2S

HCl  +  NaOH  →    NaCl  +  H2O

Double replacement

Two ionic compounds in aqueous solution “switch partners” to form at least one new solid, liquid, or gas.

AB

+CD

AD

+CB

Double Replacement The positive ions in two compounds

switch places in a reaction & make two new compounds.

Positive ions

Double Replacement

When lead nitrate reacts with potassium iodide, potassium nitrate and lead iodide are produced.

Lead(II)nitrate + potassium iodide potassium nitrate + lead(II)iodide

Pb(NO3)2 + 2KI 2KNO3 + PbI2

What is happening in common for all of the following

reactions? CH4  +  2 O2  →    CO2  +  2 H2O

2 C4H10  +  13 O2  →    8 CO2  +  10 H2O

C6H12O6  +  6 O2  →    6 CO2  +  6 H2O

2 C8H18  +  25 O2  →    16 CO2  +  18 H2O

C2H5OH  +  3 O2  →    2 CO2  +  3 H2O

Combustion

Compounds (typically with hydrogen and carbon) are combined with oxygen which then produces carbon dioxide and water

CxHy+O2 CO2+ H20

Combustion

A compound of carbon and hydrogen reacts with oxygen gas and produces carbon dioxide and water ALWAYS!!

++

Combustion

When ethanol reacts with oxygen gas, water and carbon dioxide are produced.

ethanol + oxygen water + carbon dioxide

C2H5OH + 3O2 3H2O + 2CO2

YouTube Experiment

Culligan Bottle Experiment Better View

Identify the type of reaction:

BaCl2  +  Na2 SO4  → 2 NaCl  +  BaSO4

1 2 3 4 5

20% 20% 20%20%20%

1. Synthesis2. Decomposition3. Single

Replacement4. Double

Replacement5. Combustion

Identify the type of reaction:

N2 +  3 H2  →    2 NH3

1 2 3 4 5

20% 20% 20%20%20%

1. Synthesis2. Decomposition3. Single

Replacement4. Double

Replacement5. Combustion

Identify the type of reaction:

CaCO3  →    CaO  +  CO2

1 2 3 4 5

20% 20% 20%20%20%

1. Synthesis2. Decomposition3. Single

Replacement4. Double

Replacement5. Combustion

Identify the type of reaction:

CH4  +  2 O2  →    CO2  +  2 H2O

1 2 3 4 5

20% 20% 20%20%20%

1. Synthesis2. Decomposition3. Single

Replacement4. Double

Replacement5. Combustion

Identify the type of reaction:

Zn  +  2 HCl  →    ZnCl2  +  H2

1 2 3 4 5

20% 20% 20%20%20%

1. Synthesis2. Decomposition3. Single

Replacement4. Double

Replacement5. Combustion

Identify the type of reaction:

C6H12O6  +  6O2  →    6CO2  +  6H2O

1 2 3 4 5

20% 20% 20%20%20%

1. Synthesis2. Decomposition3. Single

Replacement4. Double

Replacement5. Combustion