Chapter 6, Chemical Reactions
Lessons
Observing Chemical Change
Describing Chemical Reactions
Controlling Chemical Reactions
Terms
chemical reaction
chemical change
chemical formula
chemical equation
Law of Conservation of Mass
precipitate
endothermic
exothermic
reaction rates
catalyst
enzyme
NC Standard
8.P.1 Understand the properties of matter and changes that occur when matter interacts in an open and closed container.
8.P.1.4 Explain how the idea of atoms and a balanced chemical equation support the law of conservation of mass.
That reactions occur at different rates, slow to fast, and that reaction rates can be changed by changing the concentration of reactants, the temperature, the surface areas of solids, and by using a catalyst
Lesson 1, Observing Chemical Change
What are examples of physical properties?
What is a chemical property?
What is a physical change?
What is a chemical change?
What is a chemical reaction?
What is a precipitate?
What is the result of a chemical reaction?
What is an endothermic change?
What is an exothermic change?
Lesson 2, Describing Chemical Reactions
What is a chemical equation?
What is a reactant?
What are the products?
What is the Law of Conservation of Mass?
What is a closed system?
What is an open system?
Students should recognize common substances such as
sucrose (C12H22O11),
household bleach (NaClO),
hydrochloric acid (HCl),
ammonia (NH3),
baking soda (NaHCO3),
vinegar (HC2H3O2, 5% solution)
propane, C3H8
water
carbon dioxide
oxygen
table salt
Balanced Equation
Law of Conservation of Mass
Chemical Equation for Water
Lesson 3, Controlling Chemical Reactions
What is activation energy?
How can you change the rates of chemical reactions?
How does surface area increase the rate of a chemical reaction?
How does temperature increase the rate of a chemical reaction?
How does concentration increase the rate of a chemical reaction?
How does a catalyst affect the rate of a chemical reaction?
What are enzymes?
How does an inhibitor affect the rate of a chemical reaction?
Test Review
Be able to identify the parts of a chemical equation:
coefficients
subscripts
number of atoms
balanced equation
name of substances
name of elements