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Why is K(a2) << k(a1) for H2SO4 in water...

Why is `K_(a_2)` << `k_(a_1)` for `H_2SO_4` in water?

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`H_2 SO_4` is a very stong acid in water mainly due to its first ionistation to `H_3 O^+` and `HSO_4^-`.
`H_2 SO_4 + H_2 O overset(K_(a_1))hArr H_3 O^+ + HSO_4^-`
The ionistation of `HSO_4^(-)` to `H_3O^+` and `SO_2^(2-)` is very very small. That is way `Ka_2 lt lt lt Ka_1` .
`HSO_4^(-) + H_2 O overset(K_(a_1))hArr H_3 O^+ + SO_4^(2-)`
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BETTER CHOICE PUBLICATION-THE P-BLOCK ELEMENTS-QUESTION BANK
  1. Mention three areas in which H2SO4 plays an important role.

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  2. Why conc. H2 SO4 is viscous and has high boiling point ?

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  3. Why is K(a2) << k(a1) for H2SO4 in water?

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  4. Why conc. sulphuric acid is always diluted by adding sulphuric acid to...

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  5. Write the chemical equation when: Oxalic and reacts with concentrated ...

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  6. Write the chemical equation when: Formic acid reacts with concentrated...

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  7. Write the chemical equations when: Sugar reacts with conc. H2SO4.

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  8. SO3 has zero dipole moment. Why ?

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  9. Why does fluoriue show anomalous behaviour in its group ?

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  10. Why are halogens most reactive ?

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  11. Explain why Bond dissociation energy of F2 is less than that of Cl2 ?

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  12. Explain why F-F bond in fluorine is weaker than Cl-Cl bond in chlori...

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  13. Explain the following : HF is a weaker acid than HI.

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  14. Explain the following : Iodine is more soluble in KI solution than i...

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  15. Explain the following : Fluorine does not show positive oxidation st...

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  16. Explain the following : Iodine forms I3^- but F2^ does not form F3^-...

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  17. Explain: Electron gain enthalpy of chlorine is more negative than fluo...

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  18. Why electron affinity of fluorine is less than that of chlorine ?

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  19. Boiling point of HCI is lower than HF . Explain why?

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  20. Why are halogens coloured ?

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