Consider the following table of standard reduction potentials:. Which substance(s) can be reduced by C-? (a) D and B (b) A- (c) D3+ and B2+ (d) A

Standard reduction potentials are measured voltages that indicate the tendency of a chemical species to gain electrons and be reduced. Each species has a specific potential value, and a higher value means a greater likelihood of reduction. These values are typically measured under standard conditions and are crucial for predicting the direction of redox reactions.

The electrochemical series is a list of standard reduction potentials for various half-reactions, arranged from the most positive to the most negative. This series helps in determining which species can be oxidized or reduced in a reaction. By comparing the potentials, one can identify which substances can be reduced by a given reducing agent, such as C-.

Redox reactions involve the transfer of electrons between two species, where one is oxidized (loses electrons) and the other is reduced (gains electrons). Understanding the roles of oxidizing and reducing agents is essential for analyzing these reactions. In the context of the question, identifying which substances can be reduced by C- requires knowledge of their respective reduction potentials.