Here's why:

* pH scale: The pH scale measures the acidity or alkalinity of a solution. It ranges from 0 to 14.

* Neutral: A pH of 7 is considered neutral. This is the pH of pure water.

* Acidic: Solutions with a pH less than 7 are acidic.

* Alkaline/Basic: Solutions with a pH greater than 7 are alkaline or basic.

Some examples of alkaline solutions include:

* Lye (sodium hydroxide): A strong base used in soap making.

* Baking soda (sodium bicarbonate): A weak base often used in cooking and cleaning.

* Ammonia: A common household cleaner.

* Bleach: Contains sodium hypochlorite, a strong base.

Important note: The higher the pH, the more alkaline the solution.