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The P-Block Elements

Question

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HF can not be stored in glass bottles. What is the reason for this?

Solution

HF cannot be stored in glass bottles because it combines with glass (SiO₂) to form soluble complex H₂SiF₆.

8 HF + N a_{2} {SiO}_{2} \to H_{2} {SiF}_{6} + 3 H_{2} O + 2 N a F

{SiF}_{4} + 2 HF \to \underset{Soluble}{H_{2} {SiF}_{6}}

Some More Questions From The p-Block Elements Chapter

What is the covalency of nitrogen in N₂O₅?

Bond angle in PH₄⁺ is higher than that in PH₃. Why?

Write a balanced equation for the hydrolytic reactions PCl₅ in heavy water.

What is the basicity of H₃PO₄?

What happens when H₃PO₃ is heated?

List the important source of sulphur.

Write the order of thermal stability of the hydrides of Group 16 elements.

Why is H₂O a liquid and H₂S a gas?

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