JEE Main Chemistry question
Consider the reaction , with the half-reactions , V and , V (and, for reference, , V). When ammonia is added to the solution, the pH is raised from 0 to 11. Which half-cell reaction is affected by this pH change, and by how much?
Answer: (A)
Solution
Only the glucose/gluconic-acid half-reaction explicitly involves , so only its potential shifts with pH (the couple is instead affected by ammonia complexation, not directly by pH). Using the Nernst equation () for the reduction direction
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