The pyrophosphate-assisted reduction of chromium(vi) by manganese(ii) and its reverse reactionElectronic supplementary information (ESI) available: derivation of the theoretical rate laws, apparent kinetic orders of Mn(ii) at various initial concentrations of Cr(vi) and at various temperatures, initial rates at various concentrations of sodium perchlorate, parameters a and b at various temperatures, and initial rates at various temperatures. See http://www.rsc.org/suppdata/nj/b1/b104573n/ | Publicación