Hoàn thành dãy chuyển hóa sau: Si--->SiO2--->Na2SiO3--->H2SiO3--->SiO2

* Hướng dẫn giải

$\left(1\right)Si+O_2\stackrel{t^o}{\to }Si{O}_2$

$\left(2\right)Si{O}_2+2NaOH\stackrel{t^o}{\to }N{a}_{2}Si{O}_3+H_{2}O$

$\left(3\right)N{a}_{2}Si{O}_3+HCl\to NaCl+H_{2}Si{O}_3\downarrow$

$\left(4\right)H_{2}Si{O}_3\stackrel{t^o}{\to }Si{O}_2+H_{2}O$