Question

Give the electrochemical reaction taking place when an iron nail is dipped in dil.Hcl
E°Fe^2+/Fe=0.44,E°Fe^3+/Fe=0.04,E°H^0/H2​

Answer 1

Answer:

Which of the following complex can show both geometrical and optical isomerism ?

A

[NiF.ClBr.I]–2

B

[Fe(OX)3]–3

C

[Ni(dmg)2]

D

[Fe(OX)2.Cl2]–3Which of the following complex can show both geometrical and optical isomerism ?

A

[NiF.ClBr.I]–2

B

[Fe(OX)3]–3

C

[Ni(dmg)2]

D

[Fe(OX)2.Cl2]–3Which of the following complex can show both geometrical and optical isomerism ?

A

[NiF.ClBr.I]–2

B

[Fe(OX)3]–3

C

[Ni(dmg)2]

D

[Fe(OX)2.Cl2]–3Which of the following complex can show both geometrical and optical isomerism ?

A

[NiF.ClBr.I]–2

B

[Fe(OX)3]–3

C

[Ni(dmg)2]

D

[Fe(OX)2.Cl2]–3Which of the following complex can show both geometrical and optical isomerism ?

A

[NiF.ClBr.I]–2

B

[Fe(OX)3]–3

C

[Ni(dmg)2]

D

[Fe(OX)2.Cl2]–3

Answer 2

When an iron nail is dipped in dilute hydrochloric acid (HCl), an electrochemical reaction takes place.

This reaction can be broken down into the following points:

• Iron (Fe) is the metal present in the nail, and it can undergo oxidation and reduction reactions.
• HCl is an acidic solution that contains hydrogen ions (H+) and chloride ions (Cl-).
• The presence of H+ ions in the solution makes it easier for Fe to undergo oxidation and dissolve in the solution.
• The oxidation reaction of Fe produces Fe2+ ions and releases electrons:
• Fe --> Fe2+ + 2e-
• The electrons released in the oxidation reaction are taken up by the H+ ions in the solution to produce hydrogen gas (H2):
• 2H+ + 2e- --> H2
• The overall reaction can be represented as:
• Fe + 2HCl --> FeCl2 + H2

The standard electrode potentials for the Fe2+/Fe and Fe3+/Fe half-reactions are 0.44 V and 0.04 V, respectively. This indicates that Fe2+ is more easily reduced to Fe than Fe3+, and Fe is more likely to undergo oxidation in the presence of HCl.

The standard electrode potential for the H+/H2 half-reaction is 0 V, which means that H+ ions will readily accept electrons to form H2 gas.

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