Crystallisation, sublimation, extraction2 formulas
Crystallisation and sublimation
3× asked, last 2023Charcoal removes colour. Naphthalene, camphor sublime. Benzoic acid + naphthalene (both sublime): hot water.
Differential extraction
4× asked, last 2024Solvent dissolves the compound better; layers split in a separating funnel. Pure: sharp m.p., one TLC spot.
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12 more formulas in 4 topics
Distillation, Chromatography, Lassaigne's test and Quantitative estimation. Read the first part free. Sign in free with Google to read the rest and download the PDF.
Distillation3 formulas
- Simple distillation4×
- Fractional and reduced-pressure4×
- Steam distillation4×
Chromatography2 formulas
- Retardation factor6×
- Polarity and elution6×
Lassaigne's test2 formulas
- Sodium fusion2×
- Tests on the extract2×
Quantitative estimation5 formulas
- Carbon and hydrogen (Liebig)8×
- Nitrogen: Dumas2×
- Nitrogen: Kjeldahl3×
- Halogens: Carius5×
- Sulphur and phosphorus2×
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