Hydrofluoric Acid Etching Glass. Is it a chemical or physical change?
ydrofluoric Acid Etching Glass. Is it a chemical or physical change?
Since you are etching it without using abrasion or heat or by
any other physical methods, it is chemical in nature. Also, HF is a highly
reacting chemical (almost all halogen compounds are) and it reacts with
glass to corrode them.
Thus its it chemical in nature.
ScSpec is right. Specifically, you are making SiF4 or SiF6 2-
and water from SiO2 + HF
You are using a chemical to do the etching not a tool, so it is
chemical.
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