1. Cu(s) + AgNO3(aq)  Ag(s) + CuNO3(aq)
State symbols
(aq) = aqueous, dissolved in water, solution
Acids, bases, ionic solutions
(l) = liquid, molten (melted)
Melted metals, water from degrees C, elements in blue on the PT
(s) = solid
Metals, powders, precipitates elements in black on the PT
(g) = gaseous
HOFBrINCl, elements in red on the PT, steam when specified
EX: Copper wire is placed in a solution of silver nitrate.
Cu(s) + AgNO3(aq) 
Ag(s) + CuNO3(aq)

2. s How do we know if we will have a precipitate? Check solubility
INSOLUBLE = solid
SOLUBLE = aqueous s
K2CO3(aq) + AgNO3(aq) 
Ag2CO3( ) + KNO3( ) aq