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..
Sulphates are usually soluble in water except for Ag2SO4, BaSO4, CaSO4 and PbSO4 (lead sulphate).  Hope that helps (:  PbSO4 is sparingly soluble in water, its solubility at â¦ 298K is about 1.4E-4 mol/L, a very small value. So its not insoluble, it just has a very small solubility.ll nitrates are soluble in water. Lead, Silver, and Mercury, however, are some of the most insoluble metals. The halides of these metals are almost always considered insolubl â¦ e. 2 people found this useful.