Solubility Rules

CHEMDUNN is moving and getting a facelift. Pack up your stuff and we'll see you at the new place!

Check it out

Topics > Solutions > Solubility Rules

Here are some commonly used solubility rules:

Most nitrate (NO3-) salts and compounds containing alkali metals (Group 1 elements) and ammonium (NH4+) are soluble in water.
Most salts of alkali earth metals (Group 2 elements) are soluble, except for those containing sulfates (SO42-), carbonates (CO32-), chromates (CrO42-), and phosphates (PO43-).
Most chlorides (Cl-), bromides (Br-), and iodides (I-) are soluble, except for those of silver (Ag+), lead (Pb2+), and mercury (Hg22+).
Most sulfates (SO42-) are soluble, except for those of barium (Ba2+), strontium (Sr2+), lead (Pb2+), calcium (Ca2+), and silver (Ag+).
Most hydroxides (OH-) are insoluble, except for those of alkali metals (Group 1 elements) and barium (Ba2+), which are moderately soluble. Calcium (Ca2+), strontium (Sr2+), and some transition metals form slightly soluble hydroxides.
Most carbonates (CO32-) and phosphates (PO43-) are insoluble, except for those of alkali metals (Group 1 elements) and ammonium (NH4+).
Most sulfides (S2-) are insoluble, except for those of alkali metals (Group 1 elements), ammonium (NH4+), and some alkaline earth metals.

None to list

Examples and Practice Problems

🔐 Practice problems with step-by-step solution available for CHEMDUNN subscribers. Subscribe for full access to all content. Start with a 7 day free trial.