Chemical Reactions
In a chemical reaction the substances to the right of the arrow are called this/these?
What is/are products?
What kind of reaction is this:
Mn + CuSO4 → MnSO4 + Cu
Single replacement
A substance that enters a chemical reaction is called this.
a reactant
When balancing an equation, these numbers can be changed.
a coefficent
True or false:
Sometimes during a chemical reaction, one type of atom changes into another type of atom.
False
hydrogen + oxygen → water
Where are the reactants and products in this chemical reaction?
Reactants: hydrogen and oxygen
Products: Water
In the formula 5CaSO4,how many oxygen atoms do we have?
20
How many Aluminum atoms do we have in the products?
Al + O2 → Al2O3
2
This type of change occurs when a substance or multiple substances rearrange, in which a new substance is created.
chemical change
What is it called when both sides of a chemical equation do not have equal numbers of each element?
unbalanced
How many Carbons are there in 4NaHCO₃?
4
Balance the following chemical reaction:
H2 + NaCl --> HCl + Na
H2 + 2NaCl --> 2HCl + 2Na
Is this a balanced or not balanced equation?
H2S + NaCl → HCl + Na2S
Not balanced
H2S + 2NaCl → 2HCl + Na2S
What type of reaction is this:
Fe(OH)3 → Fe2O3 + 3 H2O
Decomposition
State the Law of Conservation of Mass.
matter can not be created nor destroyed, just rearranged
When balancing an equation, these numbers cannot be changed.
subscript
2 of the same atoms bonded in one molecule is called
Diatomic
The abbreviation (aq) means what?
Aqueous
Give three examples of details showing that a chemical change has taken place.
What is temp. change, color change, odor change, formation of a precipitate, formation of a gas?
Balance this equation:
P4 + O2 → P4O6
P4 + 3O2 → P4O6
How many oxygen are in 2C6H8O7
14
Balance the following equation:
NH4NO3 ---> N2O + H2O
NH4NO3 ---> N2O + 2 H2O
All of the following are examples of chemical change except:
Increase in temperature, release of light, formation of a solid, melting of ice
melting of ice
Write a chemical equation for the combustion of Methane (CH4) and balance it.
CH4 + 2O 2 → CO 2 + 2H 2O
What is the chemical formula for salt?
NaCl