来源: 日期:2021-06-23 发布人:admin
The properties and characteristics of any material are very important things, which can affect the operation, storage and transportation, production, application and other aspects of a material. We need to know more about it to master its use methods. Anhydrous glucose is a kind of monosaccharide widely distributed in nature. It contains five hydroxyl groups and one aldehyde group. It has the properties of polyol and aldehyde. The main chemical properties are as follows.
1. The aldehyde group in the molecule is reductive and can react with silver ammonia solution: CH2OH (Choh) 4cho + 2ag (NH3) 2OH (water bath heating) → CH2OH (Choh) 4coonh4 + 2ag ↓ + 3nh3 + H2O, which is oxidized to ammonium gluconate.
2. The aldehyde group can also be reduced to hexanol.
3. There are many hydroxyl groups in the molecule, which can react with acid.
4. Glucose is oxidized in organism and gives out heat (C6H12O6 + 6o2 (oxygen) + 6H2O = = 6CO2 + 12H2O + energy).
5. Anhydrous glucose can be prepared by hydrolysis of starch catalyzed by enzyme or sulfuric acid.
6. Plant photosynthesis: 6CO2 + 6H2O (chlorophyll, sunlight Catalysis) - C6H12O6 + 6o2.
7. The reaction equation of glucose with new copper hydroxide is CH2OH (Choh) 4cho + 2Cu (OH) 2 - heating > CH2OH (Choh) 4cooh + Cu2O ↓ + 2H2O.
8. Glucose is decomposed into water and carbon dioxide under certain conditions.
9. Hydrolysis of maltose: C12H22O11 + H2O (catalyst) → 2ch2oh (Choh) 4cho.
10. Hydrolysis of starch and cellulose: (C6H10O5) n + nH2O (catalyst) → nch2o (Choh) 4cho.
Anhydrous glucose is widely used in our daily life because of its above chemical properties. It is the energy source of living cells and the intermediate product of metabolism, that is, the main energy supply material of organisms. Plants produce glucose through photosynthesis. It is widely used in candy manufacturing and medicine.
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