Common table salt is called sodium chloride. It is considered a substance because it has a uniform and defined composition. All sodium chloride samples are chemically identical. Water is also a pure substance.
Salt dissolves easily in water, but salt water cannot be classified as a substance because its composition can vary. You can dissolve a small amount of salt or a large amount in a certain amount of water. A mixture is a physical mixture of two or more components, each of which retains its own identity and properties in the mixture. It only changes the shape of the salt when it dissolves in water.
It retains its composition and properties. The Stack Exchange network consists of 180 communities from Q26A, including Stack Overflow, the largest and most trusted online community for developers to learn, share their knowledge and develop their careers. Connect and share knowledge in a single, structured, searchable location. Therefore, water is not a mixture, it is a compound and it is pure.
Rainwater is a mixture, not a pure compound, but it contains dissolved gases and sometimes particles. In areas where water is contaminated with harmful substances, due to the natural environment or a natural disaster, drinking distilled water can keep people healthy. If people don't like the taste of water in an area because of dissolved minerals that give it a distinctive flavor, they may prefer the more neutral flavor of distilled water. The mineral composition of well water varies from place to place and gives water from different areas its distinctive flavors (SF Fig.
If an athlete drinks too much distilled or tap water after sweating a lot, it may alter the balance of water and salts in their body.
