Chapter 13 – Chemical Reactions
SPI 0807.9.1 - Recognize that all matter consists of atoms.
SPI 0807.9.2 - Identify the common outcome of all chemical changes.
SPI 0807.9.3 - Classify common substances as elements or compounds based on their
symbols or formulas.
SPI 0807.9.8 - Interpret the results of an investigation to determine whether a physical or
chemical change has occurred.
SPI 0807.9.10 - Identify the reactants and products of a chemical reaction.
SPI 0807.9.11 - Recognize that in a chemical reaction the mass of the reactants is equal to
the mass of the products (Law of Conservation of Mass).
Section 1
Chemical Reaction – The process of a substance _________ changing to a different
substance with different properties.
Clues of a chemical reaction
1. _________ change 2. _______ formation
3. _______ formation called a _______________
4. _________ given off as light, thermal energy, or electrical energy. Chemical reactions
happen when molecules ___________ into each other causing the starting bonds to
__________ _____________, the
atoms ______________, and new bonds are formed.
Example: CH4 + O2 → CO2 + H2O
Section 2
Chemical __________ - a shorter way to write an element’s name.
Chemical __________ - a combination of chemical _____________ and ______________
to represent a substance. It an easier way to _______ a molecules and compounds.
A chemical formula shows the __________ of atoms of each __________ in a molecule.
Examples: H2O SO4 Ca(OH)2
Chemical formulas use ____________ and ________________ to show the number of
atoms and molecules.
__________ - the small # to the _______ of the element that tells the ____ of atoms.
Examples: H2O SO4 Ca(OH)2
Coefficients - large # to the ____ of the element. Applies to the
__________ molecule!
Examples: 2H2O 4SO4 3Ca(OH)2
4SO4 3Ca(OH)2
S = ____ Ca = ____
O = ____ O = ____
H = ____
Chapter 13 – Chemical Reactions
SPI 0807.9.1 - Recognize that all matter consists of atoms.
SPI 0807.9.2 - Identify the common outcome of all chemical changes.
SPI 0807.9.3 - Classify common substances as elements or compounds based on their
symbols or formulas.
SPI 0807.9.8 - Interpret the results of an investigation to determine whether a physical or
chemical change has occurred.
SPI 0807.9.10 - Identify the reactants and products of a chemical reaction.
SPI 0807.9.11 - Recognize that in a chemical reaction the mass of the reactants is equal to
the mass of the products (Law of Conservation of Mass).
Section 1
Chemical Reaction – The process of a substance _________ changing to a different
substance with different properties.
Clues of a chemical reaction
1. _________ change 2. _______ formation
3. _______ formation called a _______________
4. _________ given off as light, thermal energy, or electrical energy. Chemical reactions
happen when molecules ___________ into each other causing the starting bonds to
__________ _____________, the
atoms ______________, and new bonds are formed.
Example: CH4 + O2 → CO2 + H2O
Section 2
Chemical __________ - a shorter way to write an element’s name.
Chemical __________ - a combination of chemical _____________ and ______________
to represent a substance. It an easier way to _______ a molecules and compounds.
A chemical formula shows the __________ of atoms of each __________ in a molecule.
Examples: H2O SO4 Ca(OH)2
Chemical formulas use ____________ and ________________ to show the number of
atoms and molecules.
__________ - the small # to the _______ of the element that tells the ____ of atoms.
Examples: H2O SO4 Ca(OH)2
Coefficients - large # to the ____ of the element. Applies to the
__________ molecule!
Examples: 2H2O 4SO4 3Ca(OH)2
4SO4 3Ca(OH)2
S = ____ Ca = ____
O = ____ O = ____
H = ____