Chemical Equations
Where the reactants are located in a chemical equation
to the left of the arrow
type of reaction that joins 2 elements together
synthesis or combination
What we place in front of chemical formulas to balance equations
Coefficient
All chemical reactions involve a change in this
Energy
Type of bond when electrons are shared
Covalent
Where the products are located in a chemical equation
to the right of the arrow
Double Points!!
The chemical reaction between iron and water vapor in the air results in?
Rust
the following equation is balanced LiCl → Li + Cl2 (true or false)
false
A chemical Reaction that absorbs energy or feels cold is called a(n) ____________ _______________
Endothermic Reaction
In a chemical reaction, the mass of the reactants is __________ to the mass of the products.
equal
subscripts tell you this
the number of atoms of each element
A solid that forms from a double replacement reaction
precipitate
Is the following equation balanced?
Fe + 3H2(SO4) → Fe(SO4)3 + 3H2
Yes
A chemical reaction that gives off energy
Exothermic Reaction
In a chemical reaction ____________ _________ are broken or formed.
Chemical Bonds
The Law of Conservation of Mass
In a chemical reaction, matter is neither created nor destroyed
type of reaction that produces one compound and one element
Single Replacement
Why we balance chemical equations
to satisfy the Law of Conservation of Mass or to make equal numbers of atoms on each side
Photosynthesis would classify as this type of reaction, in terms of energy
Endothermic
Double Points!!!
5 pieces of evidence of a chemical change
irreversible, a new product forms, gas, light, or heat released, precipitate forms, and/or colour change
The purpose of writing a chemical equation
To describe a chemical reaction using formulas and symbols or reactants and products
the ability to burn
combustion
Balance the following equation:
CO2 + H2O --> C6H12O6 + O2
6CO2 + 6H2O --> C6H12O6 + 6O2
What is 6, 6, 1, 6
What an inhibitor does to a chemical reaction (the opposite of a catalyst)
Slows down a chemical reaction
You use your ____________ to observe physical properties
senses