Delphinidin

Water molecules are held together by weak hydrogen bonds. In pure water, however, a few molecules sometimes dissociate into hydrogen (H+) and hydroxyl (OH–) ions, with the number of H+ ions precisely equaling the number of OH– ions.
Acids, which include things that taste sour like cranberry or lemon juice, are chemicals that release hydrogen ions (H+) when dissolved in water, resulting in proportionately more hydrogen than hydroxyl ions being present. Some acids, such as the acetic acid of vinegar, release relatively few hydrogen ions and are said to be weak. Strong acids such as sulfuric acid dissociate almost completely into hydrogen and sulfate ions.

Bases (also referred to as alkaline compounds) usually feel slippery or soapy. They are defined as compounds that release negatively charged hydroxyl ions (OH–) when dissolved in water. Caustic soda, which is sodium hydroxide (NaOH), is a base that dissociates in water to positively charged sodium ions (Na+) and negatively charged hydroxyl ions (OH–). Bases can also be defined as compounds that accept H+ ions.

The acidity or alkalinity of the soil or water in which a plant occurs affects how it lives and grows or even if it can exist in a particular environment. Similarly, the acidity or alkalinity of the fluids inside cells has to be stable or various chemical reactions vital to life itself can’t take place.