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
SynthesisTwo 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
DecompositionA compound breaks down into two or
more simpler substances
AB A + B
Decomposition Always takes one reactant and
breaks apart into simpler materials.
+
+ +
+
DecompositionWhen 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 replacementOne 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 replacementTwo 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
CombustionCompounds
(typically with hydrogen and carbon) are combined with oxygen which then produces carbon dioxide and waterCxHy+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