Using equation show the formation of hydrozonium ion in an aqueous solution of hydrogen chloride and tetraoxosulphate (iv)acid

2 answers

H2SO4 + H2O ==> 2[H3O]^+ + [SO4]^2-
FYI.
1. There is no such compound as tetraoxosulphate (iv)acid. You COULD mean H2SO3 but that isn't the correct name. A correct IUPAC name for H2SO3 is sulfurous acid but there are other correct names for that as well.
You could NOT have meant H2SO4 since S is +6 and not +4 in sulfuric acid.
2. I have never heard of hydrozonium ion. I think you must have meant hydronium ion which is [H3O]^+
3. Back to H2SO3, it COULD be called, correctly, dihydroxidooxidosulfur or dihydrogen sulfite or sulfurous acid but NOT tetraoxosulfate(iv) acid.