Home
Class 12
CHEMISTRY
Why is sodium carbonate extract acidifie...

Why is sodium carbonate extract acidified before performing the confirmatory test for anions ?

Text Solution

Verified by Experts

Sodium carbonate extract in addition to the sodium salts of anions contain carbonate also. On heating with the test reagent carbonates of certain metals precipitate which interfere in the detection of acid redicals. Because of this, `Na_(2)CO_(3)` is decomposed by adding `HCl, HNO_(3), H_(2)SO_(4)`, depending upon the nature of test.
Promotional Banner

Topper's Solved these Questions

  • QUALITATIVE ANALYSIS (ANION)

    RESONANCE|Exercise Exercise-2|44 Videos

  • QUALITATIVE ANALYSIS (ANION)

    RESONANCE|Exercise Exercise-3|10 Videos

  • QUALITATIVE ANALYSIS (ANION)

    RESONANCE|Exercise Matching List Type|1 Videos

  • QUALITATIVE ANALYSIS

    RESONANCE|Exercise INORGANIC CHMISTRY(Qualitative analysis)|35 Videos

  • QUALITATIVE ANALYSIS PART 1

    RESONANCE|Exercise A.L.P|39 Videos

Similar Questions

Explore conceptually related problems

Why is sodium carbonate a basic salt?

Can sodium carbonate extract be used test for CO_(3)^(2-) ions ?

Why is nitric acid added to sodium extract before adding silver nitrate for testing halogens?

Nitric acid is added to sodium fusion extract and the solution is boiled before adding silver nitrate for testing halogens because

RESONANCE-QUALITATIVE ANALYSIS (ANION)-Exercise-1
  1. Why is a green flame not obtained in the case of barium sulphate or ba...

    Text Solution

    |

  2. colourless salt (A) underset(740^(@)C) overset(Delta)to (B) +(C ) over...

    Text Solution

    |

  3. Why is sodium carbonate extract acidified before performing the confir...

    Text Solution

    |

  4. Can sodium carbonate extract be used test for CO(3)^(2-) ions ?

    Text Solution

    |

  5. What will happen if a solution of Ca(HCO(3))(2), formed by passing the...

    Text Solution

    |

  6. What will happen if bromine water is added in a white precipitate of B...

    Text Solution

    |

  7. Salt (A) + lime water to white precipitate darr white precipitate + ...

    Text Solution

    |

  8. What will happen ? (Also write the chemical equations). (a) When a f...

    Text Solution

    |

  9. A nitrite solution is added to a saturated solution of iron (II) acidi...

    Text Solution

    |

  10. Why is it necessary to test for the acid radicals first with dil. H(2)...

    Text Solution

    |

  11. Why chromyl chloride test is carried out in a dry test tube ?

    Text Solution

    |

  12. Why bromides and iodides do not respond to chromyl chloride test ?

    Text Solution

    |

  13. NaCl on heating with conc. H(2)SO(4) gives HCl where as NaBr and NaI g...

    Text Solution

    |

  14. Dilute Hydrochloric acid contains chloride ions but it doesnot give po...

    Text Solution

    |

  15. Identify the gas A, B and C.

    Text Solution

    |

  16. Why heavy metal chlorides such as Hg(2)Cl(2), AgCl, PbCl(2) etc. do no...

    Text Solution

    |

  17. Why is a freshly prepared solution of FeSO(4) used for the detection o...

    Text Solution

    |

  18. Cu^(2+) " and" Ba^(2+) interfere in the flame test for borate, why ?

    Text Solution

    |

  19. In which of the following reagents, the white precipitate fo PbSO(4) i...

    Text Solution

    |

  20. How will you distinguish between sulphite and sulphate ions ?

    Text Solution

    |