Asked Apr 11, 2019

Balance each redox reaction in acid solution using half reaction method

TeO32- + N2O4 → Te + NO3-


Expert Answer

Step 1

For balancing a redox reaction in acidic medium, following steps are involved:

Step 1 : Writing the unbalanced redox equation

Step 2

Step 2: Separating the redox reaction into two half equations. For this, the oxidation number is assigned to each atom.  The element undegoing an increase in oxidation forms oxidation half-reaction and the species undergoing decrease in oxidation number forms reduction half reaction. For assigning oxidation numbers, the oxidation number of oxygen is taken to be -2 and the sum of oxidation numbers of all the elements in the species is equal to the total charge on the species. Also, for an atom in elemental state, the oxidation number is zero.

Step 3

Thus, during the reaction, the oxidation number of Te is reduced from +4 to zer...


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Redox Reactions

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