What's in a name?
In what order are binary compounds (only 2 elements) named?
cation first, anion second
What will you use to determine the symbols and charges of their ions when writing a formula for an ionic compound?
Periodic Table or Table of Atomic Numbers and Element Symbols
What are the substances that are present before a reaction takes place called?
reactants
What type of reaction is this?
Zn + 2HCl --> ZnCl2 + H2
single replacement
Where is chemical energy stored?
in chemical bonds
When naming an ionic compound, what suffix is added to the stem of the anion?
-ide
Ex: chlorine --> chloride
In a formula for a chemical compound, the total charges on the cations and anions must add up to what?
zero
What are the substances that are present after a reaction takes place called?
products
What type of reaction is this?
2Ag + S --> Ag2S
synthesis
What is the name for the energy required to start a chemical reaction?
activation energy
What does the prefix of the second word in the name carbon dioxide indicate?
The molecule contains 2 oxygen atoms
Determine the formula for iron (II) oxide.
FeO
What are the products in the this reaction?
HCl + NaOH --> NaCl and H2O
NaCl and H2O
What element is always present as a reactant in a combustion reaction?
oxygen
What is the name given to the number used to count atoms, ions, or molecules?
moles (6.02 x 1023)
What does the name iron (III) indicate
The iron ions have a +3 charge
When writing a chemical formula, if the charges on the cation and anion are not equal, how do you write the formula?
Use the charge on the cation as the subscript for the anion and the charge on the anion as the subscript for the cation, but without the + and - signs.
EX: Na+S2- is written Na2S
How are chemical reactions usually classified?
By the type of reactants or number of reactants and products.
What type of reaction is this?
FeCl2 + Na2CO3 --> 2NaCl + FeCO3
double replacement
Name of a chemical reaction that absorbs energy from its surroundings
endothermic reaction
What is the name of the compound with the formula SiCl4?
Silicon tetracholoride
Determine the formula for iron(III) oxide
Fe2O3
If energy is part of the product in a chemical reactions, that reaction is said to be exothermic or endothermic?
exothermic
What type of reaction is this?
2H2O2 --> 2H2O + O2
decomposition
Name for a substance that speeds up a reaction
catalyst