HClVIIO4 + H2SVIO4 ClVIIIO4 + H3SVO4

This is an oxidation-reduction (redox) reaction:

SVI + e- SV (reduction)

ClVII - 1 e- ClVIII (oxidation)

H2SO4 is an oxidizing agent, HClO4 is a reducing agent.

Warning: Unknown compound 'ClO4'
Warning: Unknown compound 'H3SO4'