Question

Given:
$K^{+}+e^{-}$→K, E° = – 2.93V
$Zn^{2+}+2e^{-}$→Zn, E° = – 0.76V
$Cl_{2}+2e^{-}$→$2Cl^{-}$, E° = 1.36V
(a) Which is the best oxidizing agent?
(b) Which is the best reducing agent?
(c) Can KCl solution be stored in a zinc vessel?
(d) Can $ZnCl_{2}$ solution be stored in a potassium vessel?
(e) Can Zn react with $Cl_{2}$?

Answer 1

Given: $k^{+}$ +$e^{-}$ →K, E° = – 2.93V  

$Zn^{2+}$ +2$e^{-}$ →Zn, E° = – 0.76V

$Cl^{2-}$ +2$e^{-}$ →2$Cl^{-}$ E° = 1.36V  

a) The best oxidizing agent among the given elements is chlorine. Because chlorine has the largest positive standard electrode potential

b) The best reducing agent among the given elements is potassium. Because potassium has the least negative standard electrode potential

c) From standard electrode values, potassium is more reactive than zinc. So potassium chloride is not stored in the zinc vessel

d) From the standard electrode potential values zinc is less reactive than potassium. So zinc chloride is stored in potassium vessel

e) Yes, zinc reacts with chlorine to form zinc chloride

Answer 2

a) The best oxidizing agent among the given elements is chlorine. Because chlorine has the largest positive standard electrode potential

b) The best reducing agent among the given elements is potassium. Because potassium has the least negative standard electrode potential

c) From standard electrode values, potassium is more reactive than zinc.So potassium chloride is not stored in the zinc vessel

d) From the standard electrode potential values zinc is less reactive than potassium. So zinc chloride is stored in potassium vessel

e) Yes, zinc reacts with chlorine to form zinc chloride