What is the chemical formula for borax? na2b4o7u00b710h2o also called sodium borate, or sodium tetraborate, or disodium tetraborate. what is the mole ratio for this equation between borax and hcl? borax and hcl are in 1:2 molar ratio. what is the chemical equation of the reaction with copper oxide and hydrochloric acid? Borax. borax is the sodium tetraborate decahydrate (na2b4o7 u00b7 10h2o) that, when dissolved in water, is hydrolyzed to boric acid and ohu2212 anions, yielding a ph of about 9.13. from: experimental organic chemistry, 2016. related terms: borate; ammonium; boron atom; sodium atom; phosphate; flame retardant; boric acid; ph value; decolorization Borax is a natural mineral with a chemical formula na 2b 4o 7 u2022 10h 2o. borax also is known as sodium borate, sodium tetraborate, or disodium tetraborate. it is one of the most important boron compounds. the international union of pure and applied chemistry (iupac) name for borax is sodium tetraborate decahydrate. Na2b4o7.10h2o borax 99.5%/sodium borate 99.5% zhengzhou mahaco commercial co., ltd.