Sodium carbonate (also accepted as abrasion soda, soda ash and soda crystals), Na2CO3, is the water-soluble sodium alkali of carbonic acid. It a lot of frequently occurs as a apparent heptahydrate, which readily effloresces to anatomy a white powder, the monohydrate. Pure sodium carbonate is a white, odorless crumb that is hygroscopic (absorbs damp from the air), has an acrid taste, and forms a acerb acrid baptize solution. Sodium carbonate is able-bodied accepted domestically for its accustomed use as a baptize softener. It can be extracted from the ashes of abounding plants growing in sodium-rich soils, such as frondescence from the Middle East, kelp from Scotland and seaweed from Spain. It is synthetically produced in ample quantities from alkali (sodium chloride) and limestone by a adjustment accepted as the Solvay process.