To balance the oxygen atom in the given reaction in acidic medium
Cr2O72- (aq) → Cr3+(aq) we
The oxidation half reaction for following reaction is
Fe2+(aq) + Cr2O72-(aq) → Fe3+ (aq) + Cr3+(aq)
Oxidation half reaction for a reaction is that reaction which gives us the reactant and product formed after the oxidation of the reactant. In this case Fe+2 oxidizes itself to Fe+3 and so the oxidation of Fe+2 is oxidation half reaction. Option d correct.
In this method, the two half equations are balanced separately and then added together to give balanced equation
In the ion-electron method (also called the half-reaction method), the redox equation is separated into two half-equations - one for oxidation and one for reduction. Each of these half-reactions is balanced separately and then combined to give the balanced redox equation.
The process in which the strength of an unknown solution is calculated using a known standard solution.
A titration is a technique used to work out the concentration of an unknown solution based on its chemical reaction with a solution of known concentration. The process usually involves adding the known solution (the titrant) to a known quantity of the unknown solution (the analyte) until the reaction is complete.
For the redox reaction
MnO4– + C2O42- + H+ → Mn2+ + CO2 + H2O
The correct coefficients of the reactants for the balanced reaction are: