Hauv kev tshawb xav, cov kua qaub anhydride reacts nrog dej kom tau cov kua qaub sib haum.
Nco tseg: Tsis yog txhua txhua tus acid anhydrides yuav muab sib tov nrog dej kom tsim tau cov kua qaub. Piv txwv li, cov kua qaub anhydride ntawm acetic acid muaj" stripped" dej nruab nrab ntawm cov lwg me, thiab" stripped" dej tsis tuaj yeem rov qab los ntawm kev xa rov qab cov dej ncaj qha.
SiO2 yog tib qho laj thawj. H4SiO4 yog orthosilicic acid [Si (OH) 4], tsis yog silicic acid. Silicic acid yog H2SiO3, yog li cov dej tshem tawm yog SiO2.
Cov kua qaub ua kom tsis txaus siab ntawm H4SiO4 kuj yog SiO2, vim tias H4SiO4 sib npaug rau H2SiO3 · H2O. Cov dej sib txuas yog" externally hooked" thiab tuaj yeem muab txiav tawm yam tsis tau saib xyuas. Ib yam li alum KAl (SO4) 2 · 12H2O, cov dej ntws tuaj yeem raug rho tawm ncaj qha. Txawm hais tias nws nyob hauv tshuaj suav tshuaj, nws tsuas yog" tus neeg muab khoom sab nraud", sib npaug nrog hnav ib daim ris tsho.