Answer: This is an acid-base reaction (neutralization)
Explanations:
The balanced reaction of this chemical reaction is as follows :
[tex]2HClO_4(aq)\text{ + Ba}(OH)_2(aq)\text{ }\Rightarrow Ba(ClO_4)_2(aq)+2H_2O(l)\text{ }[/tex]
• As we can see, this is a double-displament reaction
