Explain the following reactions:
Silicon dioxide is treated with hydrogen fluoride.

Solution

When silicon dioxide is treated with hydrogen fluoride, hydro-fluorosilicic acid is formed.

SiO subscript 2 space plus space 4 HF space rightwards arrow space SiF subscript 4 space plus space 2 straight H subscript 2 straight O SiF subscript 4 space plus space 2 HF space rightwards arrow space space straight H subscript 2 SiF subscript 6

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