* pH Scale: The pH scale measures the acidity or alkalinity of a solution.
* A pH of 7 is neutral.
* Values below 7 indicate acidity.
* Values above 7 indicate alkalinity (also called basicity).
* Hydrochloric Acid (HCl): HCl is a strong acid, meaning it completely ionizes in water to release hydrogen ions (H+). These hydrogen ions make the solution acidic, resulting in a low pH.
* Sodium Hydroxide (NaOH): NaOH is a strong base. It also completely ionizes in water, but it releases hydroxide ions (OH-) instead of hydrogen ions. Hydroxide ions are responsible for the alkalinity of a solution, resulting in a high pH.
In summary: HCl is acidic with a low pH, while NaOH is basic with a high pH.
