We think that distilled water contains almost no soluble and insoluble impurities, but distilled water prevents us from getting the supplement of elements beneficial to our health and is not suitable for long-term drinking.
Although the tap water has been treated and disinfected by the waterworks, it contains some soluble impurities (especially in some hard water areas, tap water contains more calcium and magnesium compounds) and residual disinfection drugs and disinfection products dissolved in water (waterworks generally use chlorine to disinfect water, as well as unreacted toxic chlorine and a large number of Cl- mainly generated by reaction), which is harmful to the health after long-term drinking.
Boiled water means boiling tap water to remove calcium and magnesium compounds (boiling can turn hard water into soft water). Hydrogen chloride in tap water is easy to volatilize after heating because of its low boiling point. Boiling water contains almost no impurities harmful to human body. At the same time, tap water is processed from natural water, which contains trace elements needed by human body, so boiled water also contains these trace elements. Long-term drinking is good for human body. There is also a saying that boiled water on the first day will produce something beneficial to the human body on the second day, so there is a saying that drinking a cup of cold boiled water on the first morning is the most basic way to keep fit. I wonder if there is any scientific basis. )
Soda water, as the name implies, is just adding soda (scientific name sodium carbonate) to mineral water. Because sodium carbonate is a strong alkali and weak acid salt, CO2-is electrolyzed in water: (1) CO2-+H2O = reversible = HCO3-+OH-
(2) HCO3-+H2O = reversible = H2CO3+OH-
So soda water is alkaline.
Our human body is neutral and weakly acidic, and some groups will gradually form acidic constitutions for some reasons. Drinking soda water is only beneficial to acidic physique, but most people's physique is still normal, so don't follow the trend and think that drinking soda water can keep you healthy, or think it is superior to drinking mineral water, otherwise long-term drinking will make your physique weak and alkaline, which is not conducive to our health (as are the three toxic drugs).
In a word, drinking mineral water and boiled water for a long time is beneficial to human body, distilled water can't be drunk for a long time, and tap water is best not to be drunk. Soda is good for people with acidic constitution, and people with normal constitution had better not drink it.