Question

硅能与强碱溶液作用生成硅酸盐和氢气：Si+2NaOH+H₂O====Na₂SiO₃+2H₂↑对于这个反应，下列说法正确的是(    )

A.Si是氧化剂                                    B.Si是还原剂

C.NaOH和H₂O是氧化剂                          D.水是氧化剂

Answer 1

BD

解析:

====H₄SiO₄↓+2H₂↑                    ①

H₄SiO₄====H₂SiO₃+H₂O                                ②

2NaOH+H₂SiO₃====Na₂SiO₃+2H₂O                       ③

简化成：Si+2NaOH+H₂O====Na₂SiO₃+2H₂↑