Why Glass is attacked only by Hydrofluoric acid(HF)?

Open in App

Solution

Hydrofluoric acid is a weak inorganic acid but, it is corrosive in nature and also highly penetrating due to small size of F atom.
Hence unlike other acids(HCl, HBr etc) it attacks glass with the formation of fluorosilicate ions [SiF6]^2-
The reaction involved can be shown as:
SiO₂ + 6HF â†’ [SiF₆]^2- + 2H⁺ + 2H₂O

Suggest Corrections

Similar questions

Name the process in which a part of the glass is reacted with hydrogen fluoride or hydrofluoric acid to make decorative glass articles.

Glass can be etched or scratched by which of the following materials?

(1) Diamond (2) Hydrofluoric acid

(3) Aquaregia (4) conc. Sulphuric acid

Code:

Join BYJU'S Learning Program