[tashkent]

Greetings everyone!

I have a question I would like to ask u guys.  I have encountered this in my GRE Chemistry exam recently.  It deals with the reaction of BaSO4 + HCl.  Shall it form BaCl2 + H2SO4?  My friend says that its impossible to form H2SO4 in the reaction.  I would like to know the mechanism of this reaction?  Any responses will be highly appreciated.

Thanks a lot,
Tashkent

[ssssss]

Greetings everyone!

I have a question I would like to ask u guys.  I have encountered this in my GRE Chemistry exam recently.  It deals with the reaction of BaSO4 + HCl.  Shall it form BaCl2 + H2SO4?  My friend says that its impossible to form H2SO4 in the reaction.  I would like to know the mechanism of this reaction?  Any responses will be highly appreciated.

Thanks a lot,
Tashkent

No the reaction will not proceed and hence No H2SO4.

[Mitch]

I don't know, but Hard acids and hard bases like H+ and  Cl- typically like to stay with each other.

[budullewraagh]

no reaction would occur.  the barium is way too cationically active and would rather stay with the much more negative sulfate

[AWK]

BaSO4 is slightly dissolved in concentrated HCl because an equlibrium reaction
SO4(2-) + H(+) = HSO4(-)
take place (K2 of H2SO4 equals to 1.2x10^-2) ),
but this reaction cannot any practical use.