Packet for Cu lab, naming and writing formulas, reaction types and ...

compound1 + compound2
Compound3 + compound4
Two different compounds produce two other compounds. The cation of the first reactant combines with the anion of
the second compound, and the anion of the first reactant ends with the cation of the second compound
Prediction: Write the cation of one reactant with the anion of the other reactant and do the criss-cross. Then write
the anion of the first reactant with the cation of the second reactant and do the criss –cross again.
.
Example:
AgNO 3 + AlCl 3 AgCl + Al(NO 3 ) 3
Since:
Cation of first reactant: Ag +1
Anion first reactant: (NO 3 ) -1
Cation of second reactant: Al +3
Anion of second reactant: Cl -1
V. Combustion of a hydrocarbon
Hydrocarbon + oxygen
carbon dioxide + water
Hydrocarbons are used as fuels: petroleum, oil, and natural gas are hydrocarbons.
This reaction is easy to predict. The products always include water and carbon dioxide. The reactants should be a
hydrocarbon (a compound with hydrogen and carbon) and oxygen. In fact, every time you hear the word burning in
chemistry you should assume that oxygen is combined with another element or compound.
Prediction: Just write CO2 + H2O as the products. Remember that you should add O2 as a reactant when you see the
word burning.
CnHm + O2
CO2 + H2O
Example:
C4H10 + O2
CO2 + H2O