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Why do we test group V cations in the or...

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

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This order is selected on the bases of the following facts:
a. Only the chromate of barium is insoluble in acetic acid whereas those of calcium and strontium are soluble in acetic acid.
b. Both barium and strontium form insoluble sulphates but calcium does not.
c. The oxalates of barium strontium and calcium are insoluble.
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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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