Data Table: Solubility of compounds used|
| Co(NO3)2| Cu(NO3)2| Fe(NO3)3| Ba(NO3)2| Ni(NO3)2|
Na3PO4| Purple precipitate| Blue precipitate| Yellow precipitate| White precipitate| Greenish white precipitate| NaI| NR| Orange precipitate| Dark orange precipitate| NR| NR| Na2SO4| NR| NR| NR| White precipitate| NR|
NaCl| NR| NR| NR| NR| NR|
NaHCO3| NR| Blue precipitate| Light orange precipitate| White precipitate| Light blue precipitate| Na2CO3| Pink precipitate| Blue precipitate| Orange precipitate| White precipitate| Bluish white precipitate| NaOH| Blue precipitate| Greenish blue precipitate| Orange precipitate| White precipitate| Bluish white precipitate|
List of anions used: Phosphate, Iodide, Sulfate, Chloride, Bicarbonate, Carbonate, Hydroxide List of cations used: Cobalt, Copper, Iron, Barium, Nickel
A. Do your results agree with your expectations from the solubility rules/table?
Yes, the results agree with expectations from the solubility rules
B. Which anions generally form precipitates? What are exceptions?
Most salts of carbonate, CO32-
Most metal sulfides, S2-
Most metal hydroxides and oxides
Exception: salts of NH+ and the alkali metal cation
C. Which anions generally do not form precipitates? What are the exceptions?
Salts of nitrate, NO3 -
Chlorate, ClO3 -
Perchlorate, ClO4 -
Acetate, CH3CO2 -
Almost all salts of Cl -, Br -, I -
Exceptions: Halides of Ag+, Hg22+, Pb2+
Compounds containing F-
Exceptions: Fluorides of Mg2+, Ca2+, Sr2+, Ba2+, Pb2+
Salts of sulfate, SO42-
Exceptions: Sulfates of Ca2+, Sr2+, Ba2+, Pb2+
D. Which cations generally do not form precipitates?
Cations of alkali metals group1 and most of group 2
E. Select 10 reactions that produce a precipitate, color change, or gas and write balanced chemical equation and a net...