You visited us 286 times! Enjoying our articles? Unlock Full Access!

Electrode Potential

The standard ...

Question

The standard reduction potential for $C u^{2 +} 1 C u$ is +0.34 V. The reduction potential at pH = 14 for the above couple is:
$K_{s p}$ of $C u (O H)_{2} i s 1.0 \times 10^{- 19}$ .

0.34 V

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

0.56 V

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

- 0.22 V

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

N o n e o f t h e s e

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

Open in App

Solution

The correct option is B $- 0.22 V$
pH = 14, $[H^{\oplus}] = 10^{- 14}; [⊖ O] = 10^{0} = 1$
$C u (O H)_{2} \to C u^{2 +} + 2 ⊖ O H$
$K_{s p} = [C u^{2 +}] [⊖ O]^{2}$
$1.0 \times 10^{- 19} = [C u^{2 +}] [1]^{2} [C u^{2 +} + 2 e^{-} \to C u] [C u^{2 +}] = 10^{- 19} M$
$E = E^{⊖} - \frac{0.0591}{2} l o g \frac{1}{10^{- 19}}$
= $0.34 - \frac{0.0591}{2} \times 19$
$= - 0.22 V$

Suggest Corrections

Similar questions

The standard reduction potential for $C u^{2 +} | C u$ is $+ 0.34 V$ . Calculate the reduction potential at pH $= 14$ for the above couple if $K_{s p}$ of $C u (O H)_{2}$ is $1.0 \times 10^{- 19}$ .

Q. The standard reduction potential for

C u^{2 +} / C u

+ 0.34 V

. The reducing potential at

p H = 14

for the above couple is

{[C u^{2 +}] a t p H 14 i s 10^{- 19}}

Q. The reduction potential for

C u^{2 +} / C u

+ 0.34 V

. Calculate the reduction potential

(in V)

p H = 13

for the above couple

(assume saturated solution of C u (O H)_{2})

(Given: K_{s p} (C u (O H)_{2}) = 10^{- 22}

)

Q. The standard reduction potential of

C u^{2 +} / C u

couple is

0.34

V at

25^{0}

C. Calculate the reduction potential at

p H = 14

for this couple.
Given

K_{s p}

C u (O H)_{2} = 1.0 \times 10^{- 18}

)

Q. The standard reduction potential for

C u^{2 +} / C u

+ 0.34

V. What will be the reduction potential at pH

= 14

? [Given:

K_{s p}

C u (O H)_{2}

1.0 \times 10^{- 19}]

Join BYJU'S Learning Program

The standard reduction potential for Cu2+1Cu is +0.34 V. The reduction potential at pH = 14 for the above couple is:Ksp of Cu(OH)2is1.0×10−19.

The correct option is B −0.22VpH = 14, [H⊕]=10−14;[⊖O]=100=1Cu(OH)2→Cu2++2⊖OHKsp=[Cu2+][⊖O]21.0×10−19=[Cu2+][1]2[Cu2++2e−→Cu][Cu2+]=10−19ME=E⊖−0.05912log110−19=0.34−0.05912×19=−0.22V

The standard reduction potential for $C u^{2 +} 1 C u$ is +0.34 V. The reduction potential at pH = 14 for the above couple is:
$K_{s p}$ of $C u (O H)_{2} i s 1.0 \times 10^{- 19}$ .