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Will stronger acids remove rust faster than weaker acids?
Answer 1:

Acids aren't exactly causing rust, since rust requires oxygen, rather than hydrogen. Stronger acids will corrode faster than weaker acids, barring unusual circumstances (e.g. hydrofluoric acid is actually a weak acid, but the fluoride ion is so corrosive by itself that it's actually a good deal more dangerous and corrosive than hydrochloric acid, which is much stronger as an acid).



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