Name: ________________________
Group: _____
Date: _____________________
Grade 10 Science
Chapter 4: Changes in Matter
Topic: Types of Chemical Changes #2
Types of Chemical Changes
1. Synthesis & Decomposition
2. Precipitation
3. Oxidation
4. Combustion
5. Acid-Base Neutralization
6. Cellular Respiration & Photosynthesis
Label the following reactions as synthesis, decomposition, acid-base neutralization, or
precipitation reactions:
1. Synthesis - N2 (g) +
3 H2 (g) 
2 NH3 (g)
2. Acid-Base Neutralization - 2 HBr (aq) + Ba(OH)2 (aq)  BaBr2 (aq) + 2 H2O (l)
3. Decomposition - 2 H2O (l)  H2 (g) +
2 O2 (g)
4. Acid-Base Neutralization - HF (aq) +
KOH (aq) 
KF (aq)
+ H2O (l)
5. Precipitation reaction - MgCl2 (aq) + Na2SO3 (aq)  MgSO3 (s) + 2 NaCl (aq)
6. Acid-Base Neutralization - 2 HBr (aq) +
Ca(OH)2 (aq) 
CaBr2 (aq) +
2 H2O (l)
Name: ________________________
Group: _____
Date: _____________________
7. Precipitation reaction - 3 CaCl2 (aq) + 2 Na3PO4 (aq)  Ca3(PO4)2 (s) + 6 NaCl (aq)
8. Acid-Base Neutralization - H2SO4 (aq) +
Mg(OH)2 (aq) 
MgSO4 (aq) +
2 H2O (l)
Name: ________________________
Group: _____
Date: _____________________
#3 Oxidation Reactions
1. Cellular respiration is an example of an oxidation reaction.
2. Light and water speed up oxidation reactions
3. Examples of oxidation reactions:
a. 4 Fe + 3 O2 + 2 H2O → 4 FeO(OH)
i. Commonly known as rust
b. CH4 + 2O2 → CO2 + 2H2O
#5 Combustion Reactions
1. An oxidation reaction that releases a lot of energy
2. Examples:
Rusting, food going bad, tarnishing silver, burning wood
3. The energy released by cellular respiration and rusting is released very slowly
4. The energy released by cellular respiration keeps our body at 37 degrees.
The Fire Triangle: 3 conditions to be met for combustion
Name: ________________________
Group: _____
Date: _____________________
1. Oxidizing agent:
a. Causes fuel to react
b. Called oxidants
c. Example: oxygen
2. Fuel:
a. Releases a large amount of energy by reacting with an oxidizing agent
b. Examples: wood, methane, hair, vegetation, propane, coal
3. Ignition temperature:
a. Minimum temperature at which there is enough energy present to start
combustion
b. Different fuels have different ignition temperature
Applying the Fire Triangle in a problem:
In each of the following situations, which part of the fire triangle is being taken away to stop
the combustion reaction?
Name: ________________________
•
Group: _____
Date: _____________________
One way of fighting forest fires is to remove all the vegetation from certain areas
Fuel
•
Most laboratories have a blanket that can be wrapped around a person whose clothes
are on fire
•
Oxidizing agent
Buildings adjacent to the one on fire can be sprayed with water to prevent a fire from
spreading in a city
Ignition temperature
The three types of combustion
1. Rapid Combustion
a. Most spectacular
b. A large amount of energy is released as heat and/or light
2. Spontaneous Combustion
a. Example: forest fire
b. Fuel reaches ignition temperature without any outside energy source
c. Unpredictable & dangerous
3. Slow Combustion
a. Examples: Cellular respiration, rust, fermentation, food rotting
Name: ________________________
Group: _____
Date: _____________________
b. Combustion that occurs over a long period of time
c. Energy is released gradually
#6 Cellular Respiration & Photosynthesis
1. Cellular Respiration
a.
b. Equation: C6H12O6
(s)
+ 6 O2
(g)
→ 6 CO2
(g)
+ 6 H2O
(l)
+ Energy
2. Photosynthesis
a.
b. Equation: 6 CO2
(g)
+ 6 H2O
(l)
+ solar energy → C6H12O6
(s)
+ 6 O2
(g)
c. Photosynthesis produces a lot of oxygen, so plants are called producers.
Name: ________________________
Group: _____
Date: _____________________
d. Photosynthesis takes in carbon dioxide, which is a greenhouse gas.
3. Cellular respiration and photosynthesis are _________________________ reactions