Why hot alkaline solutions work well to wash grease stained utensils

This is the principle of hydrolysis of oils and fats in an alkaline environment.

Oils and fats are hydrolyzed in an alkaline environment to form carboxylic acids and alcohols. In an alkaline environment, carboxylic acids react with alkalis to form salts, an electrolyte that is readily tolerant of water. Because the K value of acid-base neutralization is very large, the reverse reaction can be ignored, so the concentration of carboxylic acid in the solution continues to decrease, so the reaction of oil hydrolysis is promoted.

In acids, oils and fats can also be hydrolyzed, but salts cannot be generated, so the concentration of carboxylic acids in the solution continues to rise, thus inhibiting the progress of hydrolysis, so hydrolysis in acid environments is indicated by reversible symbols, and arrows are used in alkalis).

The reason why the hot solution is used is to speed up the rate of reaction and promote the hydrolysis of oils!!

Oils and fats are hydrolyzed in an alkaline solution to generate glycerol and higher fatty acid salts, which are usually used to produce soap, and can ionize rcoo in aqueous solution, which is easily washed away by water.

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Oils and fats can be broken down into water-soluble alcohols and carboxylic acids (which in turn react with alkalis) in a hot alkaline solution

Oils and fats are hydrolyzed into the corresponding salts and alcohols in an alkaline solution.

heat, which increases the activity of the oil, loosens the molecular chains, increases fluidity, and is easy to clean. Heating utensils will have the same effect.

Because only the soda ash solution is alkaline and the oil is hydrolyzed under alkaline conditions, the hot soda ash solution can be used to wash the oil in daily life, so the answer is: the soda ash solution is alkaline and reacts with the oil to form a water-soluble substance and wash away the oil

The soda ash solution is alkaline and can react with oil to form a water-soluble substance and wash away the oil, the specific reasons are as follows;

1. Oils and fats are generally glycerides of higher fatty acids, which are hydrolyzed under alkaline conditions to generate glycerol and fatty acid sodium salts, which are soluble in water.

2. Oils and fats are hydrolyzed under alkaline conditions to generate sodium salts of higher fatty acids, which are raw materials for soap, so soap can also wash off oil.

3. The hot soda ash solution is purely to speed up the speed law of chemical and chemical sources, so that the oil is hydrolyzed into sodium salts and alcohols that are easily soluble in water, so as to improve the solubility and enhance the decontamination ability.

Analysis: The principle of washing oil with lye is that the oil is hydrolyzed under alkali condition to generate the water-soluble substance Burning Sakura pie. Answer: The good decontamination effect of hot lye solution is due to the increase in temperature, the degree of alkali hydrolysis is large, and the solution is highly alkaline, so the decontamination effect is good.

If the heat transfer oil is a hydrocarbon, it is not sensitive to sodium hydroxide or potassium hydroxide aqueous solution, and the vegetable fatty acids on the surface of the range hood can be neutralized and saponified.

No matter what kind of oil stain, in the case of heating, it will improve the detergency. When hot soda ash encounters oil stains, the oil stains are heated, and the natural decontamination ability will be better (the decontamination of soda ash relies on acid-base reaction). However, modern people need to use synthetic detergents containing a variety of surfactants to remove oil stains, and the decontamination effect will be doubled!

The utensils containing silicates react with a strong alkali under heated conditions, and caustic soda is a strong alkali.

The surface of the pair of utensils is not good, and it is easy to break.

Caustic soda is too alkaline and can destroy the utensils.

Why can hot soda ash solution be used in daily life to wash grease-stained utensils, and the oil stains on the utensils belong to grease, which can react with the alkaline solution to form soluble substances, so as to achieve the purpose of removing oil stains;

Soda ash is sodium carbonate, sodium carbonate is salt, sodium ions and carbonate ions are ionized in the solution, and the hydrolysis of carbonate ions is carried out step by step: CO32-+H2O HCO3-+OH-, HCO3-+H2O H2CO3+OH-, the hydrolysis of carbonate ions is endothermic reaction, increasing the temperature can promote the hydrolysis of carbonate ions, the concentration of hydroxide ions in the solution increases, the alkalinity is enhanced, and it is more conducive to removing the grease stained on the utensils, A: The soda ash solution is alkaline, The alkalinity of the hot soda ash solution is enhanced, which can better react with the oil to form a water-soluble substance and wash away the oil

Answer: Because the soda ash solution is alkaline and the oil is hydrolyzed under alkaline conditions, the hot soda ash solution can be used to wash the oil in daily life, so the answer is: the soda ash solution is alkaline and reacts with the oil to form a water-soluble substance to wash away the oil