Khimiia 10 Klass Rudzitis 2 Prakticheskaia Rabota May 2026

In the 10th-grade chemistry curriculum by Rudzitis and Feldman, Practical Work No. 2 typically focuses on the This work is designed to apply qualitative analysis to distinguish between various classes of organic substances.

The blue precipitate dissolves, forming a bright blue (cornflower blue) transparent solution. khimiia 10 klass rudzitis 2 prakticheskaia rabota

To perform the identification, the following reagents are required: Freshly prepared (copper(II) hydroxide), formed by mixing NaOHcap N a cap O cap H CuSO4cap C u cap S cap O sub 4 Blue litmus paper or universal indicator. Na2CO3cap N a sub 2 cap C cap O sub 3 (sodium carbonate) or NaHCO3cap N a cap H cap C cap O sub 3 (sodium bicarbonate). Test tubes, a spirit lamp, and a test tube holder. 3. Execution of Qualitative Tests Step A: Identifying Carboxylic Acids (e.g., Acetic Acid) In the 10th-grade chemistry curriculum by Rudzitis and

Polyhydric alcohols react with copper(II) hydroxide at room temperature. Add freshly prepared to the test tube. To perform the identification, the following reagents are

This indicates the presence of multiple hydroxyl ( −OHnegative cap O cap H ) groups on adjacent carbon atoms. Step C: Identifying Aldehydes or Glucose

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)