Terms
An amount of a substance that contains approximately 6.02 x 1023 particles of the substance
Mole
BE and Cl form a binary ionic compound with a 1:2 ratio of beryllium ions to chloride ions. What is the formula for beryllium chloride?
BeCl2
HCK is added to solid NaOH. At the end of the reaction salt (NaCl) is dissolved in water. What are the products of this chemical reaction?
NaCl and H2O
What are the substances that are present before a reaction takes place called?
Reactants
What happens to bonds during a chemical reaction?
Bonds of the reactants are broken and bonds of the products are formed
A chemical reaction that releases energy to its surroundings
Exothermic Reaction
Fluorine (F) forms a binary ionic compound with lithium (Li). What is the name of this compound?
Lithium Fluoride
Which type of reaction is this? (single replacement, double replacement, synthesis or decomposition)
2Ag + S -> Ag2S
Synthesis Reaction
What does the name Iron(III) indicate regarding what a compound contains?
Iron ions with with a 3+ charge
(Metals are cations and the III is 3)
In a compound, where is the chemical energy stored?
Bonds
A chemical reaction that absorbs energy from its surroundings
Endothermic Reaction
The chemical formula for calcium chloride (CaCl2) shows that the compound contains 2 ___________ ions for every _________ ion.
2 chloride ions for every calcium ions
Which type of reaction is this? (single replacement, double replacement, synthesis or decomposition)
Zn + 2HCl -> ZnCl2 + H2
Single Replacement Reaction
Total energy before and after a chemical reaction is the same. So energy is: created, destroyed, conserved or the same as volume
Conserved
True or False:
In a synthesis reaction, only one product is formed.
True
Compounds made of only 2 elements
Binary Compounds
Butane burns as: 2C4H10 +13O2 -> 10H2O + 8CO2
If 2 moles of butane are burned, how many moles of carbon dioxide are produced?
8 moles of carbon dioxide are produced for every 2 moles of butane burned
Which type of reaction is this? (single replacement, double replacement, synthesis or decomposition)
FeCl2 + Na2CO3 -> 2NaCl + FeCO3
Double Replacement Reaction
2Cu + O2 --> 2Cu + 315 kJ. Is this exothermic, endothermic, both or neither?
Exothermic
True or False:
In a synthesis reaction, there is only one reactant.
false
A covalently bonded group of atoms that has a positive or negative charge and acts as a unit
Polyatomic Ions
What is the chemical equation accurately describing what happens when nitrogen and hydrogen react to form nitrogen trihydride (ammonia)?
(Hint: 2 nitrogen and 6 hydrogens)
N2 + 3H2 --> 2NH3
Which type of reaction is this? (single replacement, double replacement, synthesis or decomposition)
2H2O2 -> 2H2O + O2
Decomposition Reaction
What is always present as a reactant in a combustion reaction?
Oxygen
Which type of reaction has the general formula:
AB -> A + B
Decomposition Reaction