What would occur in the reaction between #"potassium permanganate"#, #KMnO_4# and #"sodium sulfite"#, #Na_2SO_3#?
A redox reaction occurs. Sulfite should be oxidized to sulfate. Permanganate ion should be reduced to
Both equations are (I think) balanced with respect to mass and charge, as they must be if they reflect reality. The overall redox reaction excludes the electrons; so we take
Which is (I think) balanced with respect to mass and charge.
So what would you observe in this reaction?
How did I know the oxidation/reduction products? Experience and practice, and actually doing the titrations and observing and explaining the colour change.