Formaldehyde is a colorless, flammable, strong-smelling chemical that is used in building materials and to produce many household products.ormaldehyde is a colorless, flammable, strong-smelling chemical that is used in building materials and to produce many household products.
Actually most of the salts are insoluble in water. Not all the salts include chloride!!! And of those witch contain chloride, silver, led and mercury salts are insoluble!!! chemically speaking, not all salts are soluble in a particular solvent under normal conditions..
Common insoluble (sparingly soluble) salts are carbonates, hydroxides, sulfates, and sulfides. Sodium hydroxide is added to cobalt (II) nitrate. The reaction produces sodium nitrate (soluble) and cobalt (II) hydroxide, which is only sparingly soluble.