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Grade 10 - Unit Plan Chemical Reactions (Law of Conservation of Mass…
Grade 10 - Unit Plan
Chemical Reactions
Law of Conservation of Mass
Physical change
boiling water
melting ice cubes
popcorn
closed system
account for discrepencies
experiments with different materials and systems
mass
scale
taring
weight (different than mass)
measuring mass
Reactants and Products
Chemical Reactions
burning a candle
having a campfire (burning wood)
baking soda and vinegar
rusting of iron
salt water
real life examples
mass can neither be created nor destroyed in a chemical reaction (mass will remain the same if the system is closed during the reaction)
Constructing Chemical Reactions
Important Terms
Chemical bonds
Molecules
Oxygen
Hydrogen
Carbon
Elements
Chemical Reactions
Atoms
Compound
Products and Reactants
The atoms in the products come from the atoms in the reactants. In a chemical reaction, bonds between atoms in the reactants are broken and the atoms rearrange and form new bonds to make the products.
Engage
Tea light demonstration
CH4 + 2O2 --> CO2 + H2O
Do chemical reactions only happen in the classroom?
What are some examples of chemical reactions?
Rusting of iron
Burning of wood
Metabolism of food in your body
CHEMICAL REACTIONS ARE EVERYWHERE!
Explore
What happens when two chemicals come together in a reaction?
C + O2 = CO2
CH4 + 2O2 → CO2 + 2H2O
2H2 + O2
2H2 + O2 → H20
Explain
Through hands-on learning, students will conceptually understand the atoms in the products only come from the reactants. There are no other atoms available. No new atoms are created, and no atoms are destroyed.