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p-Block Elements – II — Chemistry STD 12 — Question

Tamilnadu BoardEnglish MediumSTD 12Chemistryp-Block Elements – II3 Marks
Question
Why HF is not stored in glass bottles?
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Answer

HF rapidly reacts with silica and glass to form soluble salt and that process leads to break the glass bottles. Hence HF is not stored in glass bottles.
$SiO _2+4 HF \rightarrow SiF _4+2 H _2 O$
$Na _2 SiO _3+6 HF \rightarrow Na _2 SiF _6+3 H _2 O$

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