Question

The _____ agents is the substance in a redox reaction that donates electrons.

a. buffering
b. half-reaction
c. reducing
d. oxidizing

Answer 1

OILRIG.
oxidation is loss of electron while reduction is the gain. oxidizing agents oxidize to be reduced while reducing agents reduce to be oxidized. reducing agents donate electrons.

Answer 2

heres a handy rhyme:
OIL RIG
Oxidation Is Loss of electrons (donates)
Reduction Is Gain of electrons (accepts/receives)
In this instance, we are looking for the substance that gets oxidized. The Reducing agent CAUSES reduction, but it itself get oxidized. therefore youre looking at c, the reducing agent