DO NOW THURSDAY
• List the elements and tell the number of atoms of each
element in the following compound:
NH4Cl
• Draw a model of this compound.
TODAYS PLAN
• Distinguish between symbol and formula.
• Conclude the number of atoms of each element that exists in a
molecule/compound.
• Differentiate between the model of a compound versus a model
of an element.
If Time allows:
• Distinguish between symbol, formula, and chemical equation.
• Differentiate between a reactant and a product.
TODAYS DO
• We will complete a Making Molecules Activity for a quiz grade.
• We will begin discussing chemical equations if time allows.
DO NOW FRIDAY
• Tell the number of atoms in the following compound.
Al(NO3)3
• Draw it.
TODAYS PLAN
• Distinguish between symbol, formula, and chemical equation.
• Differentiate between a reactant and a product.
• Prove the Law of Conservation of Mass using chemical
equations.
TODAYS DO
• We will discuss chemical equations.
• We will discuss the Law of Conservation of Mass.
• We will practice identifying reactants and products and
determining if equations obey the Law of Conservation of Mass.
TODAYS PLAN
• Distinguish between symbol and formula.
• Conclude the number of atoms of each element that exists in a
molecule/compound.
• Differentiate between the model of a compound versus a model
of an element.
If Time allows:
• Distinguish between symbol, formula, and chemical equation.
• Differentiate between a reactant and a product.
TODAYS DO
• We will finish the Making Molecules Activity for a quiz grade.
• We will begin discussing chemical equations if time allows.
CHEMICAL EQUATIONS
Chemical Equations
• Show us what we get when a chemical reaction (or
chemical change) happens.
What does a chemical equation look like?
The starting substances are BEFORE the arrow.
The ending substances are AFTER the arrow.
Starting substances = REACTANTS (BEFORE the arrow)
Ending substances = PRODUCTS (AFTER the arrow)
The Law of Conservation of Mass
• Says that matter cannot be created or destroyed; only
changed from one form to another.
• This mean that the number of atoms of each element on
each side of the arrow in a chemical equation must be the
SAME.
• It also means that amount of mass (grams) on each side
of the equation must be the SAME.
10 g
20 g
15 g
?g
The Law of Conservation of Matter
6
a.
CH4 + 2O2  2H2O + CO2
b.
Na + Cl2  NaCl
c.
Ca(OH)2 + 2HCl  CaCl2 + 2H2O
The Law of Conservation of Matter
7.
a. Mg(OH)2 + 2NaCl  MgCl2 + 2NaOH
magnesium hydroxide
hydroxide
24g
sodium chloride
?
?
20g
Sodium
30g
The Law of Conservation of Matter
7
b.
Na2SO4 + BaCl2  BaSO4 + 2NaCl
sodium sulfate
73g
?
27g
barium sulfate
36 g
sodium chloride
?
The Law of Conservation of Matter
7
c.
Na3PO4 + BaF2  Ba2(PO4)3 + NaF
sodium phosphate
?
?
32g
barium phosphate
64g
sodium fluoride
17g
DO NOW MONDAY
• Answer the multiple choice questions on the
sheet given to you.
• These will count as a quiz grade.
TODAYS PLAN
• Distinguish between symbol, formula, and chemical equation.
• Differentiate between a reactant and a product.
• Prove the Law of Conservation of Mass using chemical equations.
• Explain the factors that influence the rate of chemical reactions.
• Explain concentration.
• Define endothermic reaction and exothermic reaction.
TODAYS DO
• We will discuss chemical equations.
• We will discuss the Law of Conservation of Mass.
• We will practice identifying reactants and products and determining if
equations obey the Law of Conservation of Mass.
• We will discuss factors that affect the rate of a chemical reaction.
• We will define endothermic and exothermic reactions.
• We will practice predicting the rate of reactions and determining if
reactions are endothermic or exothermic.
DO NOW TUESDAY
• Answer the multiple choice questions on the
sheet given to you.
• These will count as a quiz grade.
TODAYS PLAN
• Develop/design a model to describe how mass is conserved and
the number of atoms does not change during a chemical
reaction.
• Design/construct/modify a device that can release or absorb
thermal energy by chemical processes.
TODAYS DO
• We will do a lab activity in which we prove the Law of
Conservation of Mass and also investigate how the temperature
of a reaction can tell us what type of reaction occurred.
Factors Affecting Rate of Reaction
• There are different things (factors) that speed up or slow
down a chemical reaction.
Factors Affecting Rate of Reaction
SPEED UP
• Higher Temperature
(Heating)
SLOW DOWN
• Lower Temperature
(Cooling)
• Stirring or Shaking
• Catalyst
• Higher Concentration
• Lower Concentration
Factors Affecting Rate of Reaction
• A catalyst is a chemical that speeds up the rate of a
reaction by lowering the activation energy.
• Activation Energy is like the “match” needed to get a
reaction started.
Factors Affecting Reaction Rate
• Concentration refers to the “strength” of a solution.
• Concentration is a measure of the number of particles of a
substance that are in a solution.
Factors Affecting Rate of Reaction
High Concentration
• When you put 4 cups of
sugar in your gallon of
kool-aid= lots of sugar
particles in your kool-aid
Low Concentration
• When you put only 1 cup
of sugar in your gallon of
kool-aid= few sugar
particles in your kool-aid
Endothermic Reactions
• Absorb energy from the environment
• Causes temperature to decrease (gets COLD)
• Products have more energy than reactants
Exothermic Reactions
• Releases energy to the environment
• Causes temperature to increase (gets HOT)
• Reactants have more energy than products
DO NOW WEDNESDAY
• Answer the multiple choice questions on the
sheet given to you.
• These will count as a quiz grade.
TODAYS PLAN
• Prove the Law of Conservation of Mass using chemical
equations.
• Explain the factors that influence the rate of chemical reactions.
• Explain concentration.
• Define endothermic reaction and exothermic reaction.
TODAYS DO
• We will discuss factors that affect reaction rate and types of
reactions.
• We will discuss the lab activity from yesterday and turn it in.
• We will practice for our open response.
• If time permits, we will do our open response.
DO NOW THURSDAY
• Answer the multiple choice questions on the
sheet given to you.
• These will count as a quiz grade.
TODAYS PLAN
• Prove the Law of Conservation of Mass using chemical
equations.
• 2.3 Explain how plants give us food in the form of glucose
(carbohydrates).
• 3.1 Describe how animals use oxygen and glucose from plants
in cellular respiration to get energy.
• 3.3 Recognize how plants and animals are interdependent in
the process of photosynthesis and respiration.
TODAYS DO
• We will review/practice proving the Law of Conservation of
Conservation of Mass using chemical equations.
• We will answer an open response question about proving the
Law of Conservation of Conservation of Mass using chemical
equations.
• We will do a Gizmo about photosynthesis and cellular
respiration.