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Silicon dioxide is insoluble in water ad in all acids except_____acid.

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Silicon dioxide is insoluble in water ad in all acids except_____acid.
A. hydrochloric
B. hydrofluoric
C. hydrobromic
D. hydroiodic
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Correct Answer - B
`SiO_(2) + 6HF rarr H_(2)SiF_(6) + 2H_(2)O`
This reaction explains why hydrofluoric acid is used to each glass.
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