Strong Base: A pH value of 14 represents a strong base. This indicates the maximum concentration of hydroxide ions (OH-) in a solution. Strong bases completely dissociate in water, releasing all their hydroxide ions. Examples of strong bases include sodium hydroxide (NaOH) and potassium hydroxide (KOH).
Neutral Substance: A pH value of 7 represents a neutral substance. This means the concentration of hydrogen ions (H+) is equal to the concentration of hydroxide ions (OH-) in the solution. Neutral substances neither donate nor accept protons, making them neither acidic nor basic. Examples of neutral substances include pure water and salt solutions.