How would you account for the following:(i) H2S is more acidic than H2

1.	How would you account for the following:(i) H2S is more acidic than H2O.(ii) The N—O bond in NO2- is shorter than the N—O bond in NO3- .(iii) Both O2 and F2 stabilise high oxidation states but the ability of oxygen to stablise the higher oxidation state exceeds that of fluorine.
Answer» (i) This is because bond dissociation enthalpy of H—S bond is lower than that of H—O bond. (ii) This is because two bonds share a double bond in the resonance hybrid structure of NO₂^–while three bonds share a double bond in the resonance hybrid structure of NO₃^– . This is because NO₂^–has bond order 1.5 while NO₃^–has bond order 1.33. (iii) This is due to tendency of oxygen to form multiple bonds with metal atom.

How would you account for the following:(i) H2S is more acidic than H2O.(ii) The N—O bond in NO2- is shorter than the N—O bond in NO3- .(iii) Both O2 and F2 stabilise high oxidation states but the ability of oxygen to stablise the higher oxidation state exceeds that of fluorine.

Answer»

(i) This is because bond dissociation enthalpy of H—S bond is lower than that of H—O bond.
(ii) This is because two bonds share a double bond in the resonance hybrid structure of NO₂^–while three bonds share a double bond in the resonance hybrid structure of NO₃^– . This is because NO₂^–has bond order 1.5 while NO₃^–has bond order 1.33.

(iii) This is due to tendency of oxygen to form multiple bonds with metal atom.

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How would you account for the following:(i) H2S is more acidic than H2O.(ii) The N—O bond in NO2- is shorter than the N—O bond in NO3- .(iii) Both O2 and F2 stabilise high oxidation states but the ability of oxygen to stablise the higher oxidation state exceeds that of fluorine.

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