Characteristics and uses of water

The characteristics and uses of water are as follows:

1, the properties of water can be divided into physical properties and chemical properties. Physically speaking, water is usually a colorless and odorless transparent liquid. At standard temperature and pressure, the boiling point of water is 100 degrees Celsius, and the freezing point of water is 0 degrees Celsius. When water freezes, its volume expands, so ice is less dense than water and can float on the water. Chemically, water reacts with some nonmetallic oxides to generate acid, with some metal oxides to generate alkali, and with some metal oxides to generate alkali. 2. Water is used for domestic use, washing face, brushing teeth, bathing and cooking. Agricultural water, crop irrigation, pesticide dilution. Industrial water, cooling, washing, manufacturing and processing. At the same time, the life activities of animals and plants are inseparable from water, and adults need to supplement about 2.5 liters of water every day on average. In the laboratory, it can be used to dissolve substances into solutions, clean instruments, serve as reagents, and collect gases through drainage. Water is an important part of all living things.