Solubility Guides for Salts- HONORS CHEM (CLEAR)

Soluble

dissociates and dissolves in water (aqueous; can’t be seen)

insoluble

doesn’t dissociate or dissolve in water (forms a solid; precipitate can be seen)

Alkali metals

always soluble

nitrates (NO₃)

always soluble

ammonium (NH₄)

always soluble

chlorates (ClO₃)

always soluble

acetates (CH₃COO)

always soluble

Chlorides (Cl)

almost always soluble

EXCEPT

-silver

-mercury (I)

-lead (II)

Bromides (Br)

almost always soluble

EXCEPT

-silver

-mercury (I)

-lead (II)

Iodides (I)

almost always soluble

EXCEPT

-silver

-mercury (I)

-lead (II)

Sulfates (SO₄)

almost always soluble

EXCEPT

-calcium

-strontium

-barium

-mercury (I)

-lead (II)

Carbonates

almost always insoluble

EXCEPT

-alkali metals

-ammonium

Phosphates (PO₄)

almost always insoluble

EXCEPT

-alkali metals

-ammonium

Silicates (SiO₄)

almost always insoluble

EXCEPT

-alkali metals

-ammonium

Hydroxides (OH)

almost always insoluble

EXCEPT

-alkali metals

-ammonium

-calcium

-strontium

-barium