The standard emf for the cell reaction Zn + Cu2+ → Zn2+ + Cu is 1.10 volt at 25°C. The emf for the cell reaction when 0.1 M Cu2+ and 0.1 M Zn2+ solutions are used at 25°C is

Question

The standard emf for the cell reaction Zn + Cu2+ → Zn2+ + Cu is 1.10 volt at 25°C. The emf for the cell reaction when 0.1 M Cu2+ and 0.1 M Zn2+ solutions are used at 25°C is (A) 1.10 volt (B) 0.110 volt (C) -1.10 volt (D) -0.110 volt

Tardigrade Admin · Accepted Answer

E=1.1 -(0.0591/2)log (0.1/0.1) ⇒ 1.10 V

Q. The standard emf for the cell reaction $Z n + C u^{2 +} \to Z n^{2 +} + C u$ is $1.10$ volt at $25° C .$ The emf for the cell reaction when $0.1 MC u^{2 +}$ and $0.1 MZ n^{2 +}$ solutions are used at $25° C$ is

$1.10$ volt

$0.110$ volt

$- 1.10$ volt

$- 0.110$ volt

$E = 1.1 - \frac{0.0591}{2} l o g \frac{0.1}{0.1} \Rightarrow 1.10 V$

Q. The standard emf for the cell reaction Zn+Cu2+→Zn2++Cu is 1.10 volt at 25°C. The emf for the cell reaction when 0.1MCu2+ and 0.1MZn2+ solutions are used at 25°C is

1.10 volt

0.110 volt

−1.10 volt

−0.110 volt