Why Fe when react with HCl forms FeCl2 why not FeCl3?
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Fe (II) or Ferrous compounds are readily formed as the 2nd ionization energy is considerably less as compared to the third ionization energy.
Fe has electronic configuration as : [ Argon ] 3d^6 4s^2.
The outermost electrons in 4s2 are readily given out to Chlorine. But it requires a further catalyst or oxidant like Oxygen or H2O2 etc, to give out an unpaired 3d^6 electron.
Ferric (Fe (III) ] compounds are more stable as compared to Ferrous ( Fe (II) ) compounds.
Only very small amount of Fe Cl3 is formed when Iron reacts with H Cl acid. A lot of Fe Cl2 is formed.
Fe has electronic configuration as : [ Argon ] 3d^6 4s^2.
The outermost electrons in 4s2 are readily given out to Chlorine. But it requires a further catalyst or oxidant like Oxygen or H2O2 etc, to give out an unpaired 3d^6 electron.
Ferric (Fe (III) ] compounds are more stable as compared to Ferrous ( Fe (II) ) compounds.
Only very small amount of Fe Cl3 is formed when Iron reacts with H Cl acid. A lot of Fe Cl2 is formed.
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