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can i ask how to do sub/super scripts, its easier for writing out chemical formulas
Has anybody ever experimented with H2So4 on Salt (sodium chloride to be official), or any other halide salt - sodium bromide, sodium iodide (peeeewww [xx(] [xx(] what a stink the H2S produces, that wasn't too much fun in my back garden. Anyways i was wondering if anybody buys it, where do they get it from? my source was a friend who is a chemistry teacher at a sixth form college, much fun to be had with concentrated acids!!!    
H2SO4 is a strong enough oxidising agent to oxidise HI. In doing so some of it is reduced to SO2 and H2S.