A solution contains magnesium ions $({Mg}^{+ 2})$ , iron(II) ions $({Fe}^{+ 2})$ and copper ions $({Cu}^{+ 2})$ . On passing an electric current through this solution in which ions will be the first to be discharged at the cathode. write the equation for the cathode reaction.

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Solution

A solution contains magnesium ions $({Mg}^{+ 2})$ , iron(II) ions $({Fe}^{+ 2})$ , and copper ions $({Cu}^{+ 2})$ , The ion having the highest reduction potential is the magnesium ion.
Since the magnesium ion has the highest reduction potential, it will be the first ion to be discharged at the cathode.
The equation for the cathode reaction is:
${Mg}^{+ 2} + 2 e^{-} \to Mg$

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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?

(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 solution contains magnesium ions (

{Mg}^{2 +}

), iron (II) ions (

{Fe}^{2 +}

) and copper ions (

{Cu}^{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.

Q. 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?

A solution containing 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.

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A solution contains magnesium ions(Mg+2), iron(II) ions (Fe+2) and copper ions(Cu+2). On passing an electric current through this solution in which ions will be the first to be discharged at the cathode. write the equation for the cathode reaction.

A solution contains magnesium ions $({Mg}^{+ 2})$ , iron(II) ions $({Fe}^{+ 2})$ and copper ions $({Cu}^{+ 2})$ . On passing an electric current through this solution in which ions will be the first to be discharged at the cathode. write the equation for the cathode reaction.