Because they don´t react with water.
Filtration.
neutral Ph 7
Substances that are not acidic or alkaline are neutral in their pH. Lots of substances exhibit a slight variance from a pH of 7, which is neutral. We don't notice many of them because they aren't far from neutral.
neutral substances are natural in nature whereas basic substances are basic .
Water is an electrically neutral substance.
Two neutral substances would include pure water and most types of salts.
water
Soluble substances dissolve in a solvent, forming a homogeneous mixture. Insoluble substances do not dissolve in a solvent, leading to a heterogeneous mixture where the solute particles remain suspended in the solvent.
Neutral substances have a pH of 7, which means they are neither acidic nor basic. Water is an example of a neutral substance with a pH of 7.
Alkaline substances have a pH above 7, acidic substances have a pH below 7, and neutral substances have a pH of 7. The difference lies in the concentration of hydrogen ions: alkaline substances have fewer hydrogen ions, acidic substances have more hydrogen ions, and neutral substances have an equal amount of hydrogen ions and hydroxide ions.
Water
7