Name: Gibbs Free Energy, EMF and Equilibrium Constant
Uploaded: 2019-07-19
Duration: 6 min 15 s
Description: There are various thermodynamic parameters that are to be considered while studying the working of an electrochemical cell. Let's learn about them here!

Question

Predict the products of electrolysis in each case: An aqueous solution of ${CuCl}_{2}$ with $Pt$ electrodes.

Accepted Answer

The process of electrolysis is the interchange of atoms and ions by the removal or addition of electrons to the external circuit. The product of the process depends upon the nature of material, electrolyte any additive chemical and their values of standard electrode. The required products of electrolysis are in a different physical state from the electrolyte and can be removed by some physical processes.

The electrolysis will only take place when electricity is passed through the copper chloride solution.The positive copper(II) ions Cu²⁺ (from copper chloride) and the H⁺ ions (from water) are attracted to the negative cathode.

$Reactions taking place in solution {CuCl}_{2} (s) \to {Cu}^{2 +} + 2 {Cl}^{-} H_{2} O \to H^{+} + {OH}^{-}$
$Reaction at cathode {Cu}^{2 +} + 2 e^{-} \to Cu (s) Reaction at anode 2 {Cl}^{-} \to {Cl}_{2} + 2 e^{-}$
Hence, $Cu$ is deposited on cathode and ${Cl}_{2}$ is evolved at anode.

${Cu}^{2 +}$ ion concentration decreases progressively and the solution becomes acidic due to the formation of $HCl .$

Predict the products of electrolysis in each case: An aqueous solution of ${CuCl}_{2}$ with $Pt$ electrodes.

Important Questions on Electrochemistry

Learn and Prepare for any exam you want !

Predict the products of electrolysis in each case: An aqueous solution of CuCl2 with Pt electrodes.

Important Questions on Electrochemistry

Learn and Prepare for any exam you want !

Predict the products of electrolysis in each case: An aqueous solution of ${CuCl}_{2}$ with $Pt$ electrodes.