There are two chlorides of lead - the diehloride and the perchloride. The first is prepared by precipitating a solution of lead nitrate with hydrochloric acid. Or in place of the lead nitrate, acetate may be used, and common salt solution instead of the hydrochloric acid. The precipitate is heavy and crystalline, and, dissolved again in boiling water and cooled, separates again as needle-shaped crystals. To produce the perchloride, dissolve the dioxide in strong, well-cooled hydrochloric acid, whereby a yellow, strong oxidising solution is obtained. Prom this, water and alkalis may be made to throw down the dioxide.