Khimiia 10 Klass Rudzitis 2 Prakticheskaia Rabota «UHD»
Polyhydric alcohols react with copper(II) hydroxide at room temperature. Add freshly prepared to the test tube.
Both aldehydes and glucose (which contains an aldehyde group) react with upon heating. Add and heat the mixture gently. khimiia 10 klass rudzitis 2 prakticheskaia rabota
Below is a structured report (essay-style) for this practical work. 1. Define the Objective Polyhydric alcohols react with copper(II) hydroxide at room
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 Add and heat the mixture gently
This indicates the presence of multiple hydroxyl ( −OHnegative cap O cap H ) groups on adjacent carbon atoms. Step C: Identifying Aldehydes or Glucose
Polyhydric alcohols react with copper(II) hydroxide at room temperature. Add freshly prepared to the test tube.
Both aldehydes and glucose (which contains an aldehyde group) react with upon heating. Add and heat the mixture gently.
Below is a structured report (essay-style) for this practical work. 1. Define the Objective
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
This indicates the presence of multiple hydroxyl ( −OHnegative cap O cap H ) groups on adjacent carbon atoms. Step C: Identifying Aldehydes or Glucose