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

Product prediction
How can classifying reactions help you predict products? We need to look at a few more details before doing that, since some
types of reaction are subdivided into subtypes.
I. Composition or combination reactions
A + B
AB
Element + element
Compound
Prediction: Write the same elements in the reactants as the products and do the criss-cross.
Example:
Fe + O2 Fe2O3
(The product above is rust, by the way!)
II.
Decomposition
AB
compound
compound
compound
A + B
element + element
element + compound
compound + compound
Subtypes of decomposition reactions
You need to memorize the products that each of the following decomposition reactions produce so you can predict
what a given decomposition reaction will produce
A. Electrolysis of binary compound
A binary compound is a compound made up of exactly two elements.
Examples: NaCl, MgO, H2O
Compound
element + element
A compound is split into individual elements. Electrolysis is used in many industrial processes in order to
produce individual elements that are normally found as compounds in nature. For example, electrolysis is used to produce Al
by separating it from its ore, Al(OH)3.
Prediction: simply write each individual element as a product. Do not forget to put a subscript 2 on the diatomic
elements! N2, O2, F2, Cl2, Br2, I2, H2
AB
A + B
Examples:
NaCl
H2O
Na + Cl
H2 + O2