Advertisement Remove all ads

Answer the following in one or two sentences. What is standard cell potential for the reaction 3Ni(s) + 2Al3+ (1 M) → 3Ni2+ (1 M) + 2Al(s), if ENi∘ = - 0.25 V and EAl∘ = - 1.66 V? - Chemistry

Advertisement Remove all ads
Advertisement Remove all ads
Advertisement Remove all ads
Short Note

Answer the following in one or two sentences.

What is standard cell potential for the reaction

3Ni(s) + 2Al3+ (1 M) → 3Ni2+ (1 M) + 2Al(s), if `"E"_("Ni")^circ` = - 0.25 V and  `"E"_("Al")^circ` = - 1.66 V?

Advertisement Remove all ads

Solution

Given:  `"E"_("Ni")^circ` = - 0.25 V, `"E"_("Al")^circ` = - 1.66 V

To find: Standard cell potential

Formula: `"E"_"cell"^circ = "E"_"cathode"^circ - "E"_"anode"^circ`

Calculation: Electrode reactions are

At anode: Ni(s) → `"Ni"_(("aq"))^(2+) + 2"e"^-`

At cathode: `"Al"_("aq")^(3+) + 3"e"^(-) -> "Al"_(("s"))`

The standard electrode potential is given by

`"E"_"cell"^circ = "E"_"cathode"^circ - "E"_"anode"^circ`

`"E"_"cell"^circ = "E"_"Al"^circ - "E"_"Ni"^circ`

= (- 1.66 V) - (- 0.25 V) = - 1.41 V

The standard cell potential for the reaction is –1.41 V.

Concept: Electrode Potential and Cell Potential
  Is there an error in this question or solution?
Advertisement Remove all ads

APPEARS IN

Balbharati Chemistry 12th Standard HSC for Maharashtra State Board
Chapter 5 Electrochemistry
Exercises | Q 2.05 | Page 118
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×