Tea

Hg^2+ ->[I-] HgI2 ->[I-] {[Hg^{II}I4]^2-}Hg^2+ ->[I-] HgI2 ->[I-] {[Hg^{II}I4]^2-}Fe^{II}Fe^{III}204KCr(SO4)2*12H2OKCr(SO4)2.12H2O
donkey kong is trans