| http://www.w3.org/ns/prov#value | - For example, in the case of a silica-based sol in which tetraethylorthosilicate or TEOS ((C2H5O)4Si) is mixed with deionized water, a diluent or solvent such as ethyl alcohol or ethanol (C2H5OH), and a catalyst such as HF or ammonia, hydrolysis occurs with the following reaction: (C2H5O)4Si+4H2O???4C2H5OH+Si(OH)4.
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