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Why are all aqueous solution of the coba...

Why are all aqueous solution of the cobaltous salts pink?

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All aqueous solution of cobaltous salts are pink due to the formatiion of `[Co(H_(2)O)_(6)]^(2+)` ions.
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CENGAGE CHEMISTRY ENGLISH-QUALITATIVE INORGANIC SALT ANALYSIS-Viva Voce Questions And Part-C (Analysis Of Cations)
  1. Why are Zn,MnNi,Co not precipitated n the group III as hydroxides?

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  2. Why are the group IV cations not precipitated as sulphides on passing ...

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  3. Why is a brownish ppt. obtained in group II even if iron aluminium and...

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  4. Why sometimes, a black coloured precipitate obtained in group IV even ...

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  5. Why excess of NH(4)OH is used in precipitating the sulphides of group ...

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  6. Why sometimes colloidal precipitate is obtained in group IV? Comment

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  7. Why is NH(4)Cl essential in the precipitation of group V cations?

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  8. Does the excess of NH(4)Cl affect the precipitation of group V cations...

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  9. Why are all aqueous solution of the cobaltous salts pink?

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  10. At times NH(4)OH is added before adding (NH(4))(2)CO(3) to precipitate...

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  11. Na(2)CO(3) cannot be used in place of (NH(4))(2)CO(3) for the precipit...

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  12. Why is CaSO(4) not precipitated on adding ammonium sulphate to a solut...

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  13. At times warming is suggested while precipitating group V cation. Expl...

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  14. Na(2)CO(3) cannot be used in place of (NH(4))(2)CO(3) for the precipit...

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  15. Why do we test group V cations in the order of Ba, Sr, and Ca?

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  16. Why is only acetic acid employed for dissolving the group V ppt.?

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  17. Sometimes no precipitate is obtained even if group V radicals are pres...

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  18. Calcium oxalate is soluble in dilute HCl. Explain.

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  19. Why is a precipitate of magnesium carbonate not fomred along with the ...

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  20. At time a white ppt. is obtained in group VI even in the absence of Mg...

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