Question

Why is HF not stored in plain glass bottles?

Answer 1

1. HF reacts with silicon dioxide (SiO₂), a major component of glass.
2. This reaction etches and damages the glass surface.
3. It forms hexafluorosilicic acid or other silicon fluorides.
4. Hence, HF can slowly dissolve or weaken glass containers.
5. Therefore, HF is stored in containers made of materials like plastic or metal that do not react with it.