$$\ce{6HF +SiO2->H2SiF6 +2H2O}$$
$\ce{HF}$ reacts with $\ce{SiO2}$ to form $\ce{H2SiF6}$.
Do other hydrogen halides like $\ce{HCl}$ and $\ce{HBr}$ react with group 14 oxides in the same way?
Answer
All reactions taken from this site.
First some maths: 4 hydrogen halides can react with 5 Group 14 monoxides and dioxides. So, there should be 40 different chemical reaction combination possible. But not all reactions are feasible.
HF
- With $\ce{SiO2}$ (already mentioned)
$$\ce{GeO2 + 4HF → GeF4 + 2H2O}$$
$$\ce{SnO + 2HF ->[333 K] SnF2 + H2O}$$
HCl
- $$\ce{GeO2 + 4HCl(g) ->[450-500 C] GeCl4 + 2H2O}$$
$$\ce{GeO2 + 4HCl(l) ->[170-180 C] GeCl4 + 2H2O}$$
- $$\ce{SnO + 3HCl → H[SnCl3] + H2O}$$
- $$\ce{SnO2 + 6HCl → H2[SnCl6] + 2H2O}$$
- $$\ce{PbO + 2HCl → PbCl2 + H2O}$$
- $$\ce{PbO2 + 4HCl → PbCl2 + Cl2 + 2H2O}$$
$\ce{HBr}$ and $\ce{HI}$ do not show such type of reaction.
No comments:
Post a Comment