Page 283 - Chemistry eBook

Table F:
Solubility Guidelines for Aqueous Solutions
Reffy, Table F (p. 2) shows if the substance is soluble or insoluble.
sulfate hydrogen sulfate thiosulfate
Solubility Guidelines for Aqueous Solutions
It also shows substances that are exceptions.
• The chart on the lefts shows the ions that form soluble compounds.
• The chart on the right shows the ions that form insoluble compounds.
Is AgSO4 a soluble compound? We
find that SO4 is soluble. However, the exceptions column lists ‘Ag’. Therefore, the compound is insoluble.
Ions That Form Soluble Compounds
Group 1 ions
(Li+, Na+, etc.)
ammonium (NH4+)
nitrate (NO3–)
acetate (C2H3O2– or CH3COO–)
Formula Name
H3O+ hydronium Hg22+ mercury(I) NH4+ ammonium
C2H3O2– }acetate CH3COO–
CN– CO32–
HCO3–
C2O42–
Formula
Cr O42– Cr2O72– MnO4– NO2– NO3– O22– OH– PO 3–
Name
chromate dichromate permanganate nitrite
nitrate peroxide hydroxide phosphate thiocyanate
cyanide
carbonate
hydrogen carbonate
oxalate
4 SCN–
ClO– hypochlorite SO32– sulfite
Table E
Selected Polyatomic Ions
ClO2– chlorite SO42–
ClO – chlorate HSO – 34
– 2– ClO4 perchlorate S2O3
Table F
hydrogen carbonate (HCO3–)
chlorate (ClO3–)
halides (Cl–, Br–, I–)
sulfates (SO42–)
Reference Tables for Physical Setting/Chemistry – 2011 Edition
2
Exceptions
when combined with Ag+, Pb2+, or Hg22+
when combined with Ag+, Ca2+, Sr2+, Ba2+, or Pb2+
Ions That Form
Insoluble Compounds*
carbonate (CO32–)
chromate (CrO42–)
phosphate (PO43–)
sulfide (S2–)
hydroxide (OH–)
*compounds having very low solubility in H2O
Exceptions
when combined with Group 1
ions or ammonium (NH4+)
when combined with Group 1 ions, Ca2+, Mg2+, or ammonium (NH4+)
when combined with Group 1 ions or ammonium (NH4+)
when combined with Group 1 ions or ammonium (NH4+)
when combined with Group 1 ions, Ca2+, Ba2+, Sr2+, or ammonium (NH4+)
UNIT 7: SOLUTIONS / SOLUBILITY © 282