MyQuestionIcon

2

You visited us 2 times! Enjoying our articles? Unlock Full Access!

Equilibrium Constant from Nernst Equation

The standard ...

Question

The standard electrode potential of ${Z n}^{2 +} | Z n$ is $- 0.76 V$ and that of ${C u}^{2 +} | C u$ is $0.34 V$ . The emf $(V)$ and the free energy change $(k J {m o l}^{- 1})$ , respectively, for a Daniel cell will be:

A

- 0.42

and

81

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

1.1

and

- 213

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

C

- 1.1

and

213

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

0.42

and

- 81

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $1.1$ and $- 213$
$E_{C e l l}^{0} = E_{C u^{2 +} / C u}^{0} - E_{Z n^{2 +} / Z n}^{0} = 0.34 - (- 0.76) = 1.1 V$

$Δ G = - n F E_{C e l l}^{0} = - 2 \times 96500 \times 1.1 = - 212300 J / m o l \approx - 213 k J / m o l$

Suggest Corrections

thumbs-up

0

Similar questions

Q. The electrode potential for the Daniell cell given is

1.1

Z n (s) | Z n^{2 +} (a q) | | C u^{2 +} (a q) | C u (s)

Write overall cell reaction and calculate the standard Gibb's energy for the reaction. [F

= 96487

Q. The standard electrode potential of a Daniell cell is

1.1 V

. Find the standard Gibbs energy for the reaction.

Z n (s) + C u^{2 +} (a q .) \to Z n^{2 +} (a q .) + C u (s)

Q. The standard reduction potentials of

Z n^{2 +} | Z n

C u^{2 +} | C u

are -0.76V and +0.34V respectively. What is the cell EMF of the following cell?

Z n | Z n^{2 +} (0.05 M) | | C u^{2 +} (0.005 M) | C u

[

\frac{R T}{F} = 0.059

Q. The standard cell potential for the cell

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

E_{{C u}^{2 +} / C u}^{o} = 0.34 V

E_{{z n}^{2 +} / Z n}^{o} = - 0.76 V

Q. Determine the standard emf of the cell and standard free energy change of the cell reaction

Z n | Z n^{2 +} | | N i^{2 +} | N i

. The standard reduction potentials of

Z n^{2 +} | Z n

N i^{2 +} | N i

- 0.76 V

- 0.25 V

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Equilibrium Constant from Nernst Equation

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Equilibrium Constant from Nernst Equation

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon