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MDCAT Chemistry QUESTION #4359
Question 1
The order of ease of reduction of $H^{+1}$, $Cu^{+2}$, and $Ag^{+1}$:
  • $H^{+1} > Cu^{+2} > Ag^{+1}$
  • $H^{+1} > Ag^{+1} > Cu^{+2}$
  • $Ag^{+1} > Cu^{+2} > H^{+1}$✔️
  • $H^{+1} > Cu^{+2} = Ag^{+1}$
Correct Answer Explanation
Ease of reduction follows the standard reduction potential (SRP): $Ag^{+}/Ag = +0.80\ V$, $Cu^{2+}/Cu = +0.34\ V$, $H^{+}/H_2 = 0.00\ V$. Higher SRP = easier to reduce. Order: $Ag^{+1} > Cu^{+2} > H^{+1}$.