A25ml sample of an unknown hclo4 solution requires titration with 22.62ml of 0.200m naoh to reach the equivalence point. what is the concentration of the unknown hclo4 solution

The  concentration  of HClO4  is  calculated  as  follows

write  the  equation  for  the  reaction

NaOH  + NClO4  =  Na ClO4   +  H2O

find  the  moles  of  NaOh  that is  moles  =  molarity   x volume /1000

= 22.62ml  x 0.200 /1000 =  4.524  x10^-3 moles

by   use of  mole  ratio   between  NaOh  to  HClO4  which  is  1:1  the  moles  of   HClO4  is= 4.524  x10 ^-3  moles

concentration  =  moles /volume  x1000

= (4.524 x10^-3)/25  x1000  =  0.18 M

Yes you are correct use the scientific method

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na