SO + B(OH) 3CaSO + 2BF + 6H O Boric acid when heated with soda ash it gives borax Na CO + 4B(OH) Na B O + CO + 6H O Structure of Boric acid: Boric acid has a two dimensional layered structure. It consists of [BO ] - unit and these are linked to each other by hydrogen bonds as shown in the Figure . . Uses of boric acid: .
Boric acid is used in the manufacture of pottery glases, enamels and pigments. . It is used as an antiseptic and as an eye lotion. .
It is also used as a food preservative.