Write the equation for the reaction of mixing 2 ml of 3 M (HO)2SO2 with 9 ml of 0.2 M NaClO4
One way of making acids is to use a salt of the acid needed and add H2SO4. If that is what is going on here, I would write
H2SO4 + 2NaClO4 ==> 2HClO4 + Na2SO4