mianfahad Posted March 29, 2013 Posted March 29, 2013 please tell me the reason. H2SO4 is a strong base in aqueous solution. but act as a base in HF Solution. H2SO4 + HF H3SO4+ + F-
weiming1998 Posted March 29, 2013 Posted March 29, 2013 Although HF is a weak acid in aqueous solution, as it becomes more and more concentrated (approaching 100% hydrogen fluoride) , it becomes a lot more acidic, dissociating into H+ and HF2- ions instead, and doing so far more readily than when it is diluted in water. This could mean that it can donate a proton to the H2SO4, forming the H3SO4+ ion and the stable HF2- ion. Read this (http://en.wikipedia.org/wiki/Hydrofluoric_acid).
elementcollector1 Posted March 30, 2013 Posted March 30, 2013 H2SO4 is a strong acid in aqueous solution, not a base.
mianfahad Posted March 30, 2013 Author Posted March 30, 2013 H2SO4 is a strong acid in aqueous solution, not a base. see again my question. I asked H2SO4 acts as base in HF solution. according to this equation H2SO4 + HF H3SO4+ + F-
John Cuthber Posted March 30, 2013 Posted March 30, 2013 see again my question. I asked H2SO4 acts as base in HF solution. according to this equation H2SO4 + HF H3SO4+ + F- Read what you wrote in the first post. You said "H2SO4 is a strong base in aqueous solution." Elementcollector1 was correcting this mistake. I think the answer is that the reaction H2SO4 + HF H3SO4+ + F- does take place, but does not go to completion.
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