Redox chemistry is mental
If you have an atom, and it has an extra electron, it gets a negative charge charge
If it loses an electron, it gets a positive charge
Then it redox chem, you have oxidation and reduction
Reductants undergo oxidation, where they take more electrons and get the negative
Oxidants undergo reduction, where they take electrons to gain a negative charge
And reductants undergo oxidation, where they donate electrons and gain a positive charge
All the taking and giving and the terminology is such a brain fuck