What will be standard cell potential of galvanic cell with the following reaction? 2Cr(s)+3Cd2+(aq) →2Cr3+(aq)+3Cd(s) [Given: E°Cr3+/Cr=-0.74 V and E°Cd2+/Cd=-0.40 V]

Question

What will be standard cell potential of galvanic cell with the following reaction? 2Cr(s)+3Cd2+(aq) →2Cr3+(aq)+3Cd(s) [Given: E°Cr3+/Cr=-0.74 V and E°Cd2+/Cd=-0.40 V] (A) 0.74 V (B) 1.14 V (C) 0.34 V (D) -0.34 V

Tardigrade Admin · Accepted Answer

E°cell=E°cathode-E°anode E°cell=E°cd2+/Cd-E°Cr3+/Cr =-0.40-(-0.74) =+0.34 V

Q. What will be standard cell potential of galvanic cell with the following reaction?
$2 C r_{(s)} + 3 C d_{(a q)}^{2 +} \to 2 C r_{(a q)}^{3 +} + 3 C d_{(s)}$
[Given : $E_{C r^{3 +} / C r}^{\circ} = - 0.74 V$ and $E_{C d^{2 +} / C d}^{\circ} = - 0.40 V$ ]

$0.74 V$

$1.14 V$

$0.34 V$

$- 0.34 V$

$E_{ce ll}^{\circ} = E_{c a t h o d e}^{\circ} - E_{an o d e}^{\circ}$
$E_{ce ll}^{\circ} = E_{c d^{2 +} / C d}^{\circ} - E_{C r^{3 +} / C r}^{\circ}$
$= - 0.40 - (- 0.74)$
$= + 0.34 V$

Q. What will be standard cell potential of galvanic cell with the following reaction? 2Cr(s)​+3Cd(aq)2+​→2Cr(aq)3+​+3Cd(s)​ [Given : ECr3+/Cr∘​=−0.74V and ECd2+/Cd∘​=−0.40V]

0.74V

1.14V

0.34V

−0.34V