Solubility Table

Solubility table of salts, acids and bases in water: formula and name of a compound from its ions and its solubility.

Choose a cation and an anion or click a cell of the table.

	H⁺	Li⁺	K⁺	Na⁺	NH₄⁺	Ba²⁺	Ca²⁺	Mg²⁺	Sr²⁺	Al³⁺	Cr³⁺	Fe²⁺	Fe³⁺	Ni²⁺	Co²⁺	Mn²⁺	Zn²⁺	Ag⁺	Hg²⁺	Pb²⁺	Sn²⁺	Cu²⁺
OH⁻	—	S	S	S	S	S	SS	I	SS	I	I	I	I	I	I	I	I	—	—	I	I	I
F⁻	S	SS	S	S	S	SS	I	SS	SS	SS	SS	SS	SS	S	S	SS	SS	S	—	SS	S	SS
Cl⁻	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	I	S	SS	S	S
Br⁻	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	I	SS	SS	S	S
I⁻	S	S	S	S	S	S	S	S	S	S	S	S	—	S	S	S	S	I	I	I	SS	—
S²⁻	S	S	S	S	S	S	SS	—	S	—	—	I	—	I	I	I	I	I	I	I	I	I
SO₃²⁻	S	S	S	S	S	I	I	SS	I	—	—	I	—	I	I	I	I	I	—	I	—	—
SO₄²⁻	S	S	S	S	S	I	SS	S	I	S	S	S	S	S	S	S	S	SS	—	I	S	S
NO₃⁻	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	—	S
PO₄³⁻	S	SS	S	S	S	I	I	I	I	I	I	I	I	I	I	I	I	I	I	I	I	I
CO₃²⁻	S	S	S	S	S	I	I	SS	I	—	—	I	—	I	I	I	I	I	—	I	—	—
SiO₃²⁻	I	S	S	S	—	I	I	I	I	—	—	I	—	I	I	I	I	—	—	I	—	—
CH₃COO⁻	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	S	SS	S	S	S	S

S — soluble (more than 1 g per 100 g of water), SS — slightly soluble (0.01–1 g), I — insoluble (less than 0.01 g), — — does not exist or decomposes in water.

Test yourself

The solubility table shows whether acids, bases and salts dissolve in water. Choose a cation and an anion or click a cell — the calculator writes the formula from the ion charges, names the compound and shows its solubility.

Symbols

Symbol	Meaning
S	soluble — more than 1 g per 100 g of water
SS	slightly soluble — from 0.01 to 1 g
I	insoluble — less than 0.01 g
—	does not exist or decomposes in water

How to write the formula of a salt

The charges in a compound add up to zero. Find the least common multiple of the cation and anion charges and divide it by the charge of each ion — these are the subscripts. For example, Fe³⁺ and SO₄²⁻: LCM(3, 2) = 6, subscripts 6 / 3 = 2 and 6 / 2 = 3 — Fe₂(SO₄)₃.

The table is used for ion exchange reactions: a reaction goes to completion if a precipitate (I), a gas or water forms. The data are for room temperature; individual cells may differ slightly between textbooks.