When an acid is added to an alkali the pH of the acid increases towards 7 and the pH of the alkali decreases towards 7.

This is measured using the pH scale, which runs from pH 0 to pH 14. Neutral solutions have a pH of 7 Acids have a pH less than 7 Alkalis have a pH greater than 7 Universal indicator has many ...

The pH scale goes from 0 to 14 with pH 7 as the neutral point ... Most minerals and nutrients are more soluble or available in acid soils than in neutral or slightly alkaline soils. Phosphorus is ...

If the acid remains on the tooth long enough, it dissolves tooth structure. The critical pH for enamel is 5.5, meaning any substance with this pH or lower will erode enamel. The pH scale ranges ...