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.
Water is an electrically neutral substance.
neutral substances are natural in nature whereas basic substances are basic .
Two neutral substances would include pure water and most types of salts.
water
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.
Water
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.
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.