StudyChem | Your Comprehensive Chemistry Learning Hub

Salt Analysis: Barium Chloride (BaCl2)

Salt Analysis: Barium Chloride (BaCl₂)

Salt Analysis: Barium Chloride (BaCl2)

1. Physical Examination of the Salt

ExperimentObservationInference
ColourWhiteCu, Co, Ni, Mn, Fe salts absent
SmellPungent smell observed

2. Dry Heating Test

ExperimentObservationInference
One pinch of solid salt is heated in a dry test tubePungent smelling gas observedChloride or sulphate may be present

3. Flame Test

ExperimentObservationInference
Thin, clean platinum wire dipped in conc. HCl, touched with salt, held at edge of oxidizing flameApple green colour observedBa2+ may be present

4. Concentrated H2SO4 Test

ExperimentObservationInference
One pinch of salt heated with conc. H2SO4Pungent smelling colourless gas and white fumes producedChloride may be present

5. Wet Test for Acid Radical (Chloride Ion, Cl)

ExperimentObservationInference
Aqueous solution of salt treated with dil. HNO3, followed by AgNO3Curdy white ppt observed, highly soluble in NH4OHCl confirmed
Reactions:
Cl + AgNO3 → AgCl↓ (curdy white ppt) + NO3
AgCl + 2NH4OH → [Ag(NH3)2]Cl (soluble) + 2H2O

6. Test for Zero Group Cation (NH₄⁺)

ExperimentObservationInference
Aqueous solution of salt with NH4OH, warmedNo ammoniacal smell observedNH4+ ion is absent

7. Group Analysis for Basic Radical

ExperimentObservationInference
Dilute HCl added to original solutionNo white ppt observedGroup I absent
Dilute HCl added, H2S passedNo black ppt observedGroup II absent
Solid NH4Cl addedNo ppt observedGroup III absent
NH4OH solution and H2S gas addedNo ppt observedGroup IV absent
NH4OH added, followed by (NH4)2CO3White ppt observedGroup V element present

8. Analysis of Group V (Barium Ion Confirmation)

ExperimentObservationInference
Precipitate from Group V treated with dil. acetic acid and then K2CrO4Pale yellow ppt observed (barium chromate)Barium ion confirmed
Reactions:
BaCO3 + 2CH3COOH → (CH3COO)2Ba + CO2 + H2O
(CH3COO)2Ba + K2CrO4 → BaCrO4↓ (yellow ppt) + 2CH3COOK

Conclusion

Acid Radical: Cl (Chloride ion)
Basic Radical: Ba2+ (Barium ion)

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top