Chemical Reactions Flashcards
The substances that combine in a chemical reaction are called
Reactants
When chemicals combine they make new
Substances
The process of combining substances is called a
Chemical reaction
In a chemical reaction, the bonds between their atoms are broken and
New binds created forming new substances
Chemical reaction is where substances are changed into
One or more new substance
Chemical reactions can show up in different ways and they
Leave evidence of occurring
Evidence includes change of color and
Creation of solid (precipitate)
Evidence of chemical reaction release of
Light
Evidence formation of a
Gas
Evidence change in
Temp
When chemical reaction happens, scientists ask “how did the _ (2)
Substance react
Reactants change
Scientists use _ to represent the changes that occur when chemicals react
Chemical equations
First chemical equation was written by _ in 1615
Jean beguin
A chemical equation is the _ of a chemical reaction
Symbolic representation
Instead of a = sign, chemical equations use
➡️
➡️ called
A yield sign
Chemicals on the left side of ➡️ are called
Reactants
Chemicals on right side of ➡️ are called
Products
+ means
Reacts with
➡️ means bonds are
Breaking and reforming
Number preceding the chemical symbol are called (2 CO)
Coefficient
The coefficient tells you the number of _ in that substance (2 CO)
Moles
Chemical equation example
2 CO + 02 ➡️ 2 CO2
Carbon monoxide (CO) reacts with oxygen (O) to yield
Carbon dioxide (CO2)
Don’t use 1 to indicate
Amount of moles (1 CO)
