Both components are strong electrolytes and remain virtually completely  dissociated.

I.E. nothing happens!

Totally agree with Kaj's answer.

Alain

I also don't see what would happen. A quick simulation with PHREEQC could confirm that, and would give you the numbers on the activities for the different species.

thanks for responses, 

if these two type of species will exist in aqueous solution, cause different result in oxidation of Iron, if the type of species is determined, different presumption will be considered for oxidation, 

i think by evaporating the solution and checking the vapours we will know that, 

Kaj is right. However, depending on the concentration relationships, different kind of salts could be removed e.g. during evaporation. You can find data about these  from the papers deal with studies on NaCl-H2SO4-H2O system (isotherm and polytherm solubilities). 

I would say that whole is a question of the total concentration of the acid in the resulting solution and the actual pH that should control the speciation of H2SO4, HSO4- and SO4-. Based on tabulated pKa's one can compute the distribution for any discrete pH/total conc if acid!