Calcium bromate

Calcium Bromate may be prepared by reacting calcium hydroxide with sodium bromate or by reacting calcium sulfate with barium bromate: Ca(OH)2＋ 2NaBrO3→Ca(BrO3)2＋ 2NaOH CaSO4 (aq)＋ Ba(BrO3)2 (solid)→Ca(BrO3)2 (aq)＋ BaSO4 (solid) Of the two methods, the latter seems to be more stable one since the temperature can be as high as 80°C in solution. The usual product is a monohydrate, Ca(BrO3)2·H2O. Calcium bromate monohydrate occurs as colorless, monoclinic crystals or prismatic plates which are soluble in water. This salt loses its water below 180°C and decomposes above that temperature to form calcium bromide plus oxygen.