Healthy drinking water refers to many aspects, such as water quality, how much to drink every day, and thirst is a sign of slight water loss in the body. The average daily water consumption of normal people is 2000-2500 ml, and the oxidation of substances in the body can produce 300 ml of raw water, so it is necessary to supplement 2200 ml of water every day, including the water in the diet.
Supplementing about 3000ml of water every day in summer can meet the needs of human body. The average adult urinates about 1.5 liter every day, and loses about 0.5 ~ 1 liter through breathing and perspiration. In order to ensure health, drink at least 2~2.5 liters every day.
Characteristics of water
Water (chemical formula h? O) is an inorganic substance composed of two elements: hydrogen and oxygen. Non-toxic, colorless and odorless transparent liquid at normal temperature and pressure is called the source of human life. Water is one of the most common substances on the earth, an important resource for all life, including inorganic compounds and human beings, and the most important component of living things, which plays an important role in the evolution of life. It is a kind of non-renewable resources in a narrow sense and renewable resources in a broad sense.
Pure water can conduct electricity, but it is very weak (conductivity can be ignored in daily life) and belongs to extremely weak electrolyte. Water in daily life has more positive and negative ions because it dissolves other electrolytes, and its conductivity is enhanced. Centigrade scale stipulates that the boiling point of water at standard atmospheric pressure is 100℃.