Question

Consider the following half cell reactions: $ C{{u}^{2+}}+2{{e}^{-}}=Cu $ $ E_{C{{u}^{2+}}/Cu}^{o}=0.34\,V $ $ A{{g}^{+}}+{{e}^{-}}=Ag $ $ E_{A{{g}^{+}}/Ag}^{o}=0.80\,V $ Which one of the following is true?

• A. copper can displace silver from $ AgN{{O}_{3}} $ solution
• B. silver can displace copper from $ Cu{{(N{{O}_{3}})}_{2}} $ solution
• C. silver is more reactive than copper
• D. $ C{{u}^{2+}}/Cu $ and $ A{{g}^{+}}/Ag $ with positive $ E{}^\circ $ values cannot be coupled to form a Galvanic cell

Answer 1

Answer: (A)

: The silver electrode has higher reduction potential. The resulting galvanic cell is $ C{{u}_{(s)}}|Cu_{(aq)}^{2+}||Ag_{(aq)}^{+}|Ag $