Chemistry
Chemistry
Problem
From the reduction half-reactions in the table below, select the two that, when combined under standard conditions, give a standard cell potential closest to +1.05 V. Report the letter labels of the two chosen reactions and the resulting E°cell value. A. Ag⁺ + e⁻ → Ag(s) E° = +0.80 V B. Fe³⁺ + e⁻ → Fe²⁺ E° = +0.77 V C. Ni²⁺ + 2 e⁻ → Ni(s) E° = –0.25 VIntuitive explanation
In electrochemistry, a galvanic cell's potential comes from pairing a reduction (cathode) with an oxidation (anode). The standard cell potential is —you subtract the anode's reduction potential from the cathode's. Your job is to try different pairs, calculate each , and find which combination lands closest to +1.05 V. Remember: the more positive cathode and the more negative anode give the largest voltage.
Intuitive explanation
In electrochemistry, a galvanic cell's potential comes from pairing a reduction (cathode) with an oxidation (anode). The standard cell potential is —you subtract the anode's reduction potential from the cathode's. Your job is to try different pairs, calculate each , and find which combination lands closest to +1.05 V. Remember: the more positive cathode and the more negative anode give the largest voltage.