Question

In: Chemistry

Balance the reaction: H+ + TcO4 - + HCOOH → Tc2+ + H2O + CO2

Balance the reaction:

H+ + TcO4 - + HCOOH → Tc2+ + H2O + CO2

Solutions

Expert Solution

oxidation half reaction                                         reduction half reaction

HCOOH   -------> CO2                                        TcO4^- --------------> Tc^2+

HCOOH   -------> CO2                                        TcO4^- --------------> Tc^2+ + 4H2O

HCOOH   -------> CO2+2H^+                           TcO4^- +8H^+ --------------> Tc^2+ + 4H2O

HCOOH   -------> CO2+2H^+ +2e^-            TcO4^- +8H^+ +5e^- --------------> Tc^2+ + 4H2O

                              5HCOOH   -------> 5CO2+10H^+ +10e^-           

               2TcO4^- +16H^+ +10e^- --------------> 2Tc^2+ + 8H2O

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5HCOOH + 2TcO4^- + 16H^+ -------> 5CO2 + 2Tc^2+ + 8H2O


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