The standard reduction potentials of Ag , Cu Co and Zn are 0.799,0.337,-0.277,-0.762 V respectively. Which of the following cells will have maximum cell emf?

Question

The standard reduction potentials of Ag , Cu Co and Zn are 0.799,0.337,-0.277,-0.762 V respectively. Which of the following cells will have maximum cell emf? (A)  Zn|Zn2+(1M)||Cu2+(1M)|Cu  (B)  Zn|Zn2+(1M)||Ag+(1M)|Ag  (C)  Cu|Cu2+(1M)||Ag+(1M)|Ag  (D)  Zn|Zn2+(1M)||Co2+(1M)|Co

Tardigrade Admin · Accepted Answer

E text cell =E text cell °-(0.0591/n) log ( text [oxidised species] /[ text reduced species] ) Since, concentration of all the ions is equal, higher the value of E text cell °, higher is the E text cell . (a) E text cell °=E text cathode -E text anode =0.337-(-0.762)=1.09 (b) E text cell °=0.799-(-0.762)=1.56 V (c) E text cell °=0.799-0.337=0.46 V (d) Eα ∈ 11°=-0.227-(-0.762)=0.53 V Thus, emf is maximum for the cell given in option

Q. The standard reduction potentials of $A g, C u$ Co and $Z n$ are $0.799, 0.337, - 0.277, - 0.762 V$ respectively. Which of the following cells will have maximum cell emf?

$Z n ∣ Z n^{2 +} (1 M) ∣∣ C u^{2 +} (1 M) ∣ C u$

$Z n ∣ Z n^{2 +} (1 M) ∣∣ A g^{+} (1 M) ∣ A g$

$C u ∣ C u^{2 +} (1 M) ∣∣ A g^{+} (1 M) ∣ A g$

$Z n ∣ Z n^{2 +} (1 M) ∣∣ C o^{2 +} (1 M) ∣ C o$

Q. The standard reduction potentials of Ag,Cu Co and Zn are 0.799,0.337,−0.277,−0.762V respectively. Which of the following cells will have maximum cell emf?

Zn∣Zn2+(1M)∣∣Cu2+(1M)∣Cu

Zn∣Zn2+(1M)∣∣Ag+(1M)∣Ag

Cu∣Cu2+(1M)∣∣Ag+(1M)∣Ag

Zn∣Zn2+(1M)∣∣Co2+(1M)∣Co

Q. The standard reduction potentials of $A g, C u$ Co and $Z n$ are $0.799, 0.337, - 0.277, - 0.762 V$ respectively. Which of the following cells will have maximum cell emf?

$Z n ∣ Z n^{2 +} (1 M) ∣∣ C u^{2 +} (1 M) ∣ C u$

$Z n ∣ Z n^{2 +} (1 M) ∣∣ A g^{+} (1 M) ∣ A g$

$C u ∣ C u^{2 +} (1 M) ∣∣ A g^{+} (1 M) ∣ A g$

$Z n ∣ Z n^{2 +} (1 M) ∣∣ C o^{2 +} (1 M) ∣ C o$