How to determine the acidity and alkalinity of water by pH value? What is the standard pH value of water?

pH value, also known as hydrogen ion concentration index, acid-base value, is a scale of hydrogen ion activity in a solution, which is also a measure of the acidity and alkalinity of a solution in the usual sense. This concept was proposed by Danish biochemist Peter in 1909. How to judge the acidity and alkalinity of pH value? What is the standard pH value of water? If you are interested, you may wish to open it to learn more about this knowledge.

Contents of this article

1. How to judge the acidity and alkalinity by pH value

2. What is the standard range of water pH value?

3. What are the pH values ​​of acids and bases?

How to determine the acidity and alkalinity of pH value

Normally, the pH value is used to express the acidity and alkalinity of human body fluids. The pH value generally fluctuates between 6.8 and 7.5: if it is equal to 7.0, the body fluid is neutral; if it is less than 7.0, the body fluid is acidic; if it is greater than 7.0, the body fluid is alkaline. Human body fluids should be slightly alkaline with a focus on acid-base balance. Under normal circumstances, it would be ideal if the pH value of human body fluids could be between 7.35 and 7.45.

What is the standard pH range of water?

The pH value standard of drinking water in my country is 6.5 to 8.5. The pH value of drinking water is acceptable within the normal range, and there is no optimal pH value. For the human body, drinking water is essentially to replenish H2O.

The normal pH value of human body fluids is between 7.35 and 7.45. Although the body is constantly producing and taking in acidic and alkaline substances, the pH value of body fluids does not change significantly. This is because, on the one hand, human body fluids are a buffer system, and the pH value is less affected by the outside world; on the other hand, the regulation of the lungs and kidneys will reduce the significant changes in the pH value.

There is no evidence that the pH value of water is related to health. my country's drinking water indicators do include a pH value, ranging from 6.5 to 8.5, but this is not a health indicator, but is mainly for the purpose of preventing metal pipes from being corroded by liquids with lower pH values.

Small-molecule water mostly comes from alkaline water machines, and merchants claim that water in this form is easier to absorb. Experts say that some water, such as mineral water, does have smaller molecules, but there is currently no evidence to prove that it has a direct relationship with health, let alone curing diseases.

What is the pH value of acids and bases?

At room temperature, the pH of an acid is less than 7, and the pH of a base is greater than 7.

The minimum pH value is 0 and the maximum value is 14. The larger the value, the stronger the alkalinity, and the smaller the value, the stronger the acidity.

pH value, also known as hydrogen ion concentration index, is a scale of hydrogen ion activity in a solution, which is also a measure of the acidity or alkalinity of a solution in the usual sense. This concept was proposed by Danish biochemist Peter in 1909. P stands for the German word Potenz, which means strength or concentration, and H stands for hydrogen ion (H).