Is Chinese medicine alkaline or acidic, and how to tell if a substance is alkaline or acidic

<> method of judging the acidity and alkalinity of a substance:

Method 1: The acidity and alkalinity of salts depends on the metallicity of cations. Metallic, that is, alkaline. For example, the salt formed by sodium, potassium, calcium, and weak acids is alkaline. If the metallic is weak, it is acidic.

Method 2: It is to look at the hydrolysis strength of anion and ion, if the cation is easy to hydrolyze, the substance is acidic, if the cation is not easy to hydrolyze, the substance is alkaline.

1. The nature is different.

Alkaline: The ability of a substance to provide unshared electron pairs to other substances in a solvent, and at room temperature, its pH >7, the solution is alkaline.

Acidic: The ability of a substance to supply hydrogen ions to other substances in a solvent. 25, when pH <7, the solution is acidic.

2. The characteristics are different.

Alkaline: alkali can make purple litmus solution blue; Alkali can redden colorless phenolphthalein reagents.

Acidity: The acid turns the purple litmus solution red, so that the colorless phenolphthalein solution does not change color.

3. The metallicity is different.

Alkaline: The stronger the metallicity of an element, the more alkaline the hydrate of its most ** oxide.

Acidity: The stronger the non-metallic nature of the element, the more acidic the hydrate of the most ** oxide.

Alkaline foods

Foods containing more minerals such as potassium, sodium, calcium, and magnesium often have alkaline final metabolites in the body, such as vegetables, fruits, dairy, soybeans, and mushroom foods. Proper pairing with alkaline foods helps to maintain the acid-base balance in the body.

The acidity and alkalinity of food has nothing to do with its own pH value (food that tastes sour is not necessarily acidic food), but is mainly defined by the fact that food becomes acidic or alkaline in the human body after digestion, absorption, and metabolism. Acids are produced called acidic foods, such as animal offal, muscles, and plant seeds (cereals). The production of alkaline substances is called alkaline food, such as vegetables, melons, beans, tea, etc.

The above content refers to Encyclopedia - Alkaline.

The difference between alkaline and acidic is as follows:

1. The concept is different.

A substance can provide the ability of unshared electron pairs to other substances in a solvent, and at room temperature, its pH >7, the solution is alkaline, and a substance can provide hydrogen ions to other substances in a solvent. 25, when pH <7, the solution is acidic.

2. The definitions are different.

Definition of alkalinity: The ionized anion is only hydroxide, sodium hydroxide is a very typical base, the definition of acidity: everything that can ionize hydrogen ions is called an acid, and everything that can give protons is called an acid.

Precautions for acidic use:

1. In 'metal + acid salt + hydrogen', acid usually refers to dilute sulfuric acid and dilute hydrochloric acid, and cannot be concentrated sulfuric acid or nitric acid. Because concentrated sulfuric acid or nitric acid have strong oxidizing properties, hydrogen cannot be generated when reacting with metals, and water is formed; Metals are reactive metals that are listed before 'hydrogen' in the order of metal activity table, and metals that are ranked after 'hydrogen' cannot replace hydrogen in acids.

2. Concentrated sulfuric acid has water absorption, usually used as a desiccant, sulfuric acid also has dehydration, it has a strong corrosiveness to ** or clothes, when diluting concentrated sulfuric acid, the concentrated sulfuric acid must be slowly injected into the water along the wall of the device, and constantly stirred.

Do not pour water into concentrated sulfuric acid, if the water is injected into concentrated sulfuric acid, the density of water is small, it will float on top of the sulfuric acid, and the heat released when dissolved will cause the water to boil immediately, so that the sulfuric acid liquid splashes everywhere, and accidents are prone to occur.

The above content referenceEncyclopedia - Alkaline.

The above content referenceEncyclopedia - Acidic.

The method of judging acidity and alkalinity is as follows:

1. It is acid that can provide H ions, and it is a base on the contrary;

2. It is an acid that has only H ions in the cation in the solution;

3. It is an acid that can provide electrons, and the opposite is a base;

4. There are two commonly used reagents for the identification of acidity and alkalinity, phenolphthalein and litmus, litmus reagent changes color when exposed to acid, turns blue when exposed to alkali, phenolphthalein does not change when exposed to acid, and turns red when exposed to alkali. You can also use pH test strips to compare the standard colorimetric card;

5. It is sour that has a sour taste.

The above methods can determine the acidity and alkalinity of substances, and of course experiments are the foundation of all principles.

Acidity and alkalinity are the characteristics of substances in the acid-base reaction, generally speaking, acidic substances can make purple litmus solution red, alkaline substances can make it blue, and later with the development of acid-base theory, people give a more accurate and perfect definition, and gradually touch the essence of acid-alkaline causes.

There are three scales of acidity and alkalinity: pH and POH of an aqueous solution, PKA of an acid and PKB of an alkali, and chemical hardness of an acid or base. Acidity and alkalinity are generally tested by pH test paper, litmus test solution, and phenolphthalein test solution.

1. Judge the strength of acidity

1) The most advanced oxygen-containing acids of different elements, the stronger the non-metallic nature of acid-forming elements, the stronger the acidity;

2) Oxygen-containing acids of different valences of the same element, the higher the valency of the element, the stronger the acidity;

3) For the same main group element, the more the number of free charges in the nuclear power plant, the larger the atomic radius, and the stronger the acidity of the hydride;

2. Judge the alkalinity: the stronger the metallicity of the element, the stronger the alkalinity of the hydrate of the most advanced oxide.

Delicious foods are almost all acidic, such as fish, meat, rice, wine, sugar, etc., all of which are acidic foods, on the contrary, alkaline foods such as kelp, vegetables, white radish, tofu, etc., are mostly foods that are not easy to arouse appetite but are beneficial to the body. The layman's idea is that sour things are acidic foods, such as strawberries and lemons that will make your mouth water, but in fact, these things are typical alkaline foods, and the trouble lies in this place.

White rice is a typical acidic food, and Chinese who use it as a staple food, if they do not consume a considerable amount of alkaline food, they are easy to become acidic and shiver. Especially in recent years, environmental pollution, pesticide pollution of fruits and vegetables, chemical processed foods and other hazards caused by industrial development have intensified, and calcium in food is relatively lacking due to soil acidification.

In addition, there is also a cause of acidic constitution, that is, the mental stress response of urban people. The pressure from the outside is transmitted to the accessory kidneys and pituitary gland through the diencephalon, and then transmitted to the various organs through hormonal secretion, and at this time, if the calcium ions in the blood are measured, it will definitely drop from the normal value, that is, the pressure will reduce the calcium ions in the blood and make the blood acidic. In short, environmental pollution and abnormal living and eating habits make our physique gradually become acidic, and the abnormal pace of life will cause acidic constitution, emotional stress, and the load of the body after surgery can easily make the physique acidic.

The foods we consume on a daily basis can be broadly divided into acidic foods and alkaline foods. From a nutritional point of view, a reasonable combination of acidic and alkaline foods is a guarantee for good health.

List of food acids and bases.

Strong acidic foods: egg yolks, cheese, desserts, sugar, tuna, flounder.

Medium acidic foods: ham, bacon, chicken, pork, eel, beef, bread, wheat.

Weakly acidic foods: white rice, peanuts, beer, seaweed, octopus, chocolate, water pasta, green onions.

Strong alkaline foods: grapes, tea, wine, kelp, citrus, persimmons, cucumbers, carrots.

Medium alkaline foods: soybeans, tomatoes, bananas, strawberries, egg whites, prunes, lemons, spinach, etc.

Weakly alkaline foods: red beans, apples, cabbage, tofu, cabbage, rape, pears, potatoes.

Most people have a very vague understanding of the acidity and alkalinity of food, and think that lemons that taste sour are acidic. In fact, the acidity and alkalinity of food are not determined by simple taste. The so-called acidity and alkalinity of food refers to whether the inorganic salts in the food are acidic or alkaline.

The acidity and alkalinity of food depends on the type and amount of minerals contained in the food: potassium, sodium, calcium, magnesium, and iron enter the human body and show an alkaline reaction; Phosphorus, chlorine, and sulfur are acidic when they enter the human body. Alkaline foods are mainly divided into:

1. Vegetables and fruits; 2. Seaweeds; 3. Nuts; 4. Sprouted cereals and legumes. It is necessary to avoid or reduce the intake of the following sour cherry blossom foods: 1. starch; 2. Animal food; 3. Sweets; 4. Refined and processed foods (such as white bread, etc.); 5. Fried food or cream; 6. Legumes (such as peanuts, etc.).

Summary. Yes, alkaline substances can also be acidic. The difference between alkaline and acidic is their pH.

Alkaline substances have a pH greater than 7, while acidic substances have a pH of less than 7. Therefore, when the pH of an alkaline substance is less than 7, it can be considered an acidic substance. To determine the pH of a substance, a pH test strip or pH meter can be used.

First, the substance is dissolved in water, and then a pH test strip or pH meter is placed in the solution and the pH value of the solution is measured. If the pH value of the solution is greater than 7, it means that the substance is alkaline; If the pH of the solution is less than 7, then the substance is acidic. In addition, other methods can be used to determine the pH of a substance, such as using an ion-selective electrode (ISE) or a potentiometer (pH meter).

These instruments can measure the pH of a substance more accurately and can give results faster.

Yes, alkaline substances can also be acidic. The difference between alkaline and acidic is their pH. Alkaline substances have a pH greater than 7, while acidic substances have a pH of less than 7.

Therefore, when the pH of an alkaline substance is less than 7, it can be considered an acidic substance. To determine the pH value of a substance, a pH test paper or pH meter can be used. First, the substance is dissolved in water, and then a pH test strip or pH meter is placed in the solution and the pH value of the solution is measured.

If the pH value of the solution is greater than 7, it means that the substance is alkaline; If the pH of the solution is less than 7, then the substance is acidic. In addition to this bucket, other methods can be used to determine the pH of a substance, such as using an ion-selective electrode (ISE) or a potentiometer (pH meter). These instruments can measure the pH of a substance more accurately and can give results faster.

Can you add, I don't quite understand it.

Yes, in addition to alkaline substances, there are also acidic substances. Acidic substances are acidic substances that are able to break down ions in water into hydrogen ions and other ions, thereby lowering the pH value of water. The pH of acidic sensitizers is generally lower than 7, while that of alkaline substances is generally higher than 7.

There are many types of acidic substances, such as sulfuric acid, phosphoric acid, sodium hydroxide, potassium hydroxide, etc., all of which have acidic cryptodenier properties. In addition, there are some organic substances such as acetic acid, acetic acid, citric acid, etc., which also have acidic properties. Acids are widely used in daily life, such as cleaning dirt, inhibiting the growth of microorganisms, and inhibiting the formation of harmful substances.

In addition, acidic substances can also be used to prepare some chemical reagents, such as sodium hydroxide can be used to prepare potassium hydroxide, potassium hydroxide can be used to prepare nitric acid, etc. In short, in addition to alkaline substances, there are also acidic substances, which play an important role in daily life and can also be used to prepare some chemical reagents.