Here in an electrode reaction:

$C u \to C u^{2 +} + 2 e^{-}$

At which electrode (anode or cathode) would such reaction takes place? Is this a reaction of oxidation or reduction?

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Solution

In the given reaction oxidation number of copper $(C u)$ increases from $(0 to + 2)$ i.e. oxidation takes place and in electrolysis, oxidation takes place at the anode.

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Similar questions

(a) Here is an electrode reaction :

$C u \to C u^{2 +} + 2 e^{-}$ . At which electrode (anode or cathode) would such a reaction take place? Is this an example of oxidation or reduction ?

(b) A solution contains magnesium ions $(M g^{2 +})$ , iron (II) ions $F e^{2 +}$ and copper ions $C u^{2 +}$ . On passing an electric current through this solution, which ions will be the first to be discharged at the cathode? Write the equation for the cathode reaction.

(d) During the electrolysis of molten lead bromide, which of the following takes place ?

A. Bromine is released at the cathode,

B. Lead is deposited at the anode,

C. Bromine ions gain electrons,

D. Lead is deposited at the cathode.

Q. (a) Here is an electrode reaction:
Cu → Cu²⁺ + 2e.
At which electrode (anode or cathode) would such a reaction take place? Is this an example of oxidation?
(b) A solution contains magnesium ions (Mg²⁺), iron (II) ions (Fe²⁺) and copper ions (Cu²⁺). On passing an electric current through this solution which ions will be the first to be discharged at the cathode? Write the equation for the cathode reaction.
(c) Why is carbon tetrachloride, which is a liquid, a non-electrolyte?

$Cu \to {Cu}^{2 +} + 2 e^{-}$

At which electrode (anode or cathode) would such a reaction take place? Is this an example of oxidation or reduction?

Here is an electrode reaction.

$C u \to C u^{2 +} (C u p p e r i o n s) + 2 e^{-}$

In which electrode the reaction is taking place? Is this reaction oxidation or reduction?

Q. Assertion: Starting from aq. copper [II] sulphate solution, equations for the reactions at the cathode and anode during electrolysis of aq.

C u S O_{4}

using active copper electrodes is;
at anode:

C u^{+ 2} + 2 e^{-} \to C u

at cathode:

C u \to C u^{+ 2} + 2 e^{-}

Reason: Oxidation always take place at anode and reduction at cathode.

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Here in an electrode reaction: Cu→Cu2++2e− At which electrode (anode or cathode) would such reaction takes place? Is this a reaction of oxidation or reduction?

In the given reaction oxidation number of copper (Cu) increases from (0 to +2) i.e. oxidation takes place and in electrolysis, oxidation takes place at the anode.

Here in an electrode reaction:

$C u \to C u^{2 +} + 2 e^{-}$

At which electrode (anode or cathode) would such reaction takes place? Is this a reaction of oxidation or reduction?

In the given reaction oxidation number of copper $(C u)$ increases from $(0 to + 2)$ i.e. oxidation takes place and in electrolysis, oxidation takes place at the anode.