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..
We call the cations and anions listed below spectator ions because they do not react with water. When soluble compounds containing one of these spectator ions dissolves in water we can ignore the spectator ion. Soluble compounds of two spectator ions have no direct effect on the pH of water.