Consider the following half-reactions:
Cl₂(g) + 2 e^- $\to$ 2 Cl^-(aq) $~~~~~~~~$ $~~~~~~~~$ E^$\circ$ = +1.36 V
Ag⁺(aq) + e^- $\to$ Ag(s) $~~~ ~~~~$ $~~~~ ~~~$ $~~ ~~~~$ E^$\circ$ = +0.80 V
Cu²⁺(aq) + 2 e^- $\to$ Cu(s) $~~~~~~~~$ $~~~~~~~~$ E^$\circ$= +0.34 V
Sn²⁺(aq) + 2 e^- $\to$ Sn(s) $~~~~~ ~$ $~~~ ~$ $~~~~~~~~$ E^$\circ$= -0.14 V
Al³⁺(aq) + 3 e^- $\to$ Al(s) $~~~~~~~~$ $~~~ ~~~~$ $~~~$ E^$\circ$ = -1.66 V
Which of the above elements or ions will reduce Cu²⁺(aq) ?

Question

Consider the following half-reactions:
Cl₂(g) + 2 e^-

\to

2 Cl^-(aq)

~~~~~~~~

~~~~~~~~

E^$\circ$ = +1.36 V
Ag⁺(aq) + e^-

\to

Ag(s)

~~~ ~~~~

~~~~ ~~~

~~ ~~~~

E^$\circ$ = +0.80 V
Cu²⁺(aq) + 2 e^-

\to

Cu(s)

~~~~~~~~

~~~~~~~~

E^$\circ$= +0.34 V
Sn²⁺(aq) + 2 e^-

\to

Sn(s)

~~~~~ ~

~~~ ~

~~~~~~~~

E^$\circ$= -0.14 V
Al³⁺(aq) + 3 e^-

\to

Al(s)

~~~~~~~~

~~~ ~~~~

~~~

E^$\circ$ = -1.66 V
Which of the above elements or ions will reduce Cu²⁺(aq) ?

Quizplus · Accepted Answer

Sn(s) and Al(s) can reduce Cu²⁺(aq) because they have more negative standard reduction potentials than Cu²⁺/Cu, making them better reducing agents.

Consider the Following Half-Reactions: Cl2(g)+ 2 E- →\to→ 2 Cl-(aq) ~~~~~~~~ ~~~~~~~~