Solubility Rules

Li+

Li+

soluble

Na+

soluble

K+

soluble

NH4+

soluble

NO3-

soluble

C2H3O2-

soluble

Cl-

soluble

Br-

soluble

I-

soluble

SO4^2-

soluble

OH-

insoluble

S2-

insoluble

CO3^2-

insoluble

PO4^3-

insoluble

Cl- exception

when these are paired with Ag+, Hg2^2+, Pb^2+, insoluble

Br- exception

when these are paired with Ag+, Hg2^2+, Pb^2+, insoluble

I- exception

when these are paired with Ag+, Hg2^2+, Pb^2+, insoluble

SO4^2- exception

when it pairs with Sr^2+, Ba^2+, Pb^2+, Ag+, Ca+, insoluble

OH- exception

when these are paired with Li+, Na+, K+, NH4+, soluble; Sr^2+, Ba^2+, Ca^2+ slightly soluble

S^2- exception

when these are paired with Li+, Na+, K+, NH4+, Sr^2+, Ba^2+, Ca^2+ soluble

CO3^2- exception

when it pairs with Li+, Na+, K+, NH4+, soluble

PO4^-3 exception

when it pairs with Li+, Na+, K+, NH4+, soluble