Every question from past board papers on Balancing redox reactions, newest paper first. Open any question for its full worked answer.
On balancing the given redox reaction,
\(a\,\mathrm{Cr_2O_7^{2-}} + b\,\mathrm{SO_3^{2-}(aq)} + c\,\mathrm{H^+(aq)} \rightarrow 2a\,\mathrm{Cr^{3+}(aq)} + b\,\mathrm{SO_4^{2-}(aq)} + \dfrac{c}{2}\mathrm{H_2O}(\ell)\)
the coefficients a, b and c are found to be, respectively -
For the redox reaction
MnO\(_4^-\) + C\(_2\)O\(_4^{2-}\) + H\(^+\) \(\longrightarrow\) Mn\(^{2+}\) + CO\(_2\) + H\(_2\)O
the correct coefficients of the reactants for the balanced equation are
(columns: MnO\(_4^-\), C\(_2\)O\(_4^{2-}\), H\(^+\))
