Ammonia is always added in this reaction. Which of the following must be incorrect? — Electrochemistry Chemistry Question

💡 Solution & Explanation

The addition of NH3 acts on the silver ions, complexing them to form [Ag(NH3)2]^+, which lowers the silver reduction potential from 0.8 V to 0.337 V. It has absolutely no chemical effect on the standard potential of the organic glucose-gluconic acid redox couple itself. Thus, statement (d) is definitively incorrect. Therefore, correct answer is D.