6.0 Intro to Reactions

6.0 Intro to Reactions

What is a chemical reaction??

Define a Chemical Reaction

A process in which one or more elements or compounds are changed into compounds.

Sides of a reaction

- Reactants: The substances initially present in a chemical reaction that are consumed during the reaction.

- Products: The chemicals created in a chemical reaction.

Multiple Choice

What are the reactants of the chemical reaction?

Multiple Choice

What are the products of the chemical reaction?

Multiple Choice

Which side of the chemical reaction are the reactants found on?

• Left

• Right

Multiple Choice

Which side of the reaction are the products found on

• Left

• Right

Multiple Select

What are the reactants of the reaction?

• Nitrogen

• Hydrogen

• Ammonia

Parts of a reaction

- Coefficients: The number of a particular molecule in a reaction.

- Subscripts: The number of a particular atom present in a molecule.

Multiple Choice

What is the coefficient of CO₂?

• 1

• 2

• 3

• 0

Multiple Choice

What is the coefficient for Fe₂O₃?

• 1

• 2

• 3

• 0

Multiple Choice

What is the subscript of oxygen on the product side of the reaction?

• 1

• 2

• 3

• 0

Multiple Choice

What is the subscript of hydrogen on the reactant side of the chemical reaction?

• 1

• 2

• 3

• 0

Multiple Choice

Coefficients change how much of an element or a compound is present in the chemical reaction.

• True

• False

Chemical Equation

An expression representing a chemical reaction.

Skeleton equation

A Chemical equation that does not indicate the relative amounts of reactants and products.

A chemical equation before it is balanced.

Conservation of Mass

• Mass is never created nor destroyed (it only changes)

• We always have an equal number of atoms of each element in our reactants and products.

Balanced equation

-We balance chemical equations to show that mass is always conserved

- We balance by changing the coefficients because we want to change how much we have not what we have.