Magnesium aluminum silicate [MgAl2SiO6] is used in personal care products (such as toothpaste), cosmetics, medicine, coatings, paints,

; (1) silicate is rewritten from salt to oxide, that is, the general methods of rewriting are summarized as follows: basic oxide, amphoteric oxide, acidic oxide, water (xMO? nSiO2？ mH2O)，

So the chemical formula of magnesium aluminum silicate is expressed in the form of oxide: MgO? Al2O3？ Silicon dioxide;

So the answer is: MgO? Al2O3？ Silicon dioxide;

(2) Magnesium aluminum silicate reacts with hydrochloric acid to produce magnesium chloride, aluminum chloride, silicon dioxide and water. The chemical equation of the reaction is MgO? Al2O3？ SiO 2+8 HCl = MGC L2+2 ALC L3+SiO 2+4H2O

So the answer is: MgO? Al2O3？ SiO 2+8 HCl = MGC L2+2 ALCL 3+SiO 2+4H2O；