Khimiia 10 Klass Rudzitis 2 Prakticheskaia Rabota ⚡ (TOP-RATED)

✅ Through the systematic application of qualitative reagents, we successfully identified the organic compounds. The experiment demonstrates that the chemical properties of functional groups allow for the precise differentiation of substances within different homologous series.

The blue mixture changes to yellow and then forms a brick-red precipitate ( Cu2Ocap C u sub 2 cap O Equation (for acetaldehyde): khimiia 10 klass rudzitis 2 prakticheskaia rabota

CH3CHO+2Cu(OH)2ΔCH3COOH+Cu2O↓+2H2Ocap C cap H sub 3 cap C cap H cap O plus 2 cap C u open paren cap O cap H close paren sub 2 cap C cap H sub 3 cap C cap O cap O cap H plus cap C u sub 2 cap O down arrow positive 2 cap H sub 2 cap O 4. Summary Table of Results Na2CO3cap N a sub 2 cap C cap O sub 3 Gas evolution ( CO2cap C cap O sub 2 Glycerol Bright blue solution Aldehyde / Glucose Brick-red precipitate 5. Final Conclusion Summary Table of Results Na2CO3cap N a sub

This indicates the presence of multiple hydroxyl ( −OHnegative cap O cap H ) groups on adjacent carbon atoms. Step C: Identifying Aldehydes or Glucose khimiia 10 klass rudzitis 2 prakticheskaia rabota

2CH3COOH+Na2CO3→2CH3COONa+H2O+CO2↑2 cap C cap H sub 3 cap C cap O cap O cap H plus cap N a sub 2 cap C cap O sub 3 right arrow 2 cap C cap H sub 3 cap C cap O cap O cap N a plus cap H sub 2 cap O plus cap C cap O sub 2 up arrow Step B: Identifying Polyhydric Alcohols (e.g., Glycerol)