Chemistry - Complete Pblock- Question with Solution | TestHub

Silicon dioxide ($Si{O}_2$) is known for its high chemical inertness. However, it reacts with hydrofluoric acid ($HF$) to form hexafluorosilicic acid ($H_{2}Si{F}_6$) and water. This unique reaction makes $HF$ the only common mineral acid that dissolves $Si{O}_2$.

Reaction:

$$Si{O}_2(s)+6HF(aq)\to H_{2}Si{F}_6(aq)+2H_{2}O(l)$$