In aqueous electrolysis, which factor helps determine the favored reaction?

In aqueous electrolysis, which factor helps determine the favored reaction?

• A. The pH Of The Solution
• B. The Type Of Electrode Material
• C. A Table Of Reduction Potentials
• D. The Color Of The Solution

Answer: (C)

The main idea is using reduction potentials to compare how strongly different species want to gain electrons. A table of standard reduction potentials lets you see, for each possible half-reaction, how favorable it is thermodynamically. At the cathode, the species with the more positive reduction potential is the one that will be reduced because it has a greater tendency to gain electrons. At the anode, oxidation competes with water; the species that is easier to oxidize is the one with the lower reduction potential (more easily losing electrons). By comparing these potentials, you can predict which redox couple will proceed in the aqueous solution when a voltage is applied. Other factors like pH, electrode material, or color can affect rate or overpotential, but the reduction-potential table provides the direct criterion for which reaction is favored.

The main idea is using reduction potentials to compare how strongly different species want to gain electrons. A table of standard reduction potentials lets you see, for each possible half-reaction, how favorable it is thermodynamically. At the cathode, the species with the more positive reduction potential is the one that will be reduced because it has a greater tendency to gain electrons. At the anode, oxidation competes with water; the species that is easier to oxidize is the one with the lower reduction potential (more easily losing electrons). By comparing these potentials, you can predict which redox couple will proceed in the aqueous solution when a voltage is applied. Other factors like pH, electrode material, or color can affect rate or overpotential, but the reduction-potential table provides the direct criterion for which reaction is favored.