pH

The pH scale determines whether a substance is acidic, basic, or neutral. It measures acidity or basicity on a scale from 0 to 14.

A pH of 7 is neutral. For example, distilled water is neither acidic nor basic.

Acids have a pH lower than 7. Stronger acids have a pH close to 0, while weaker acids have a pH around 5.

Bases have a pH above 7. Strong bases have a pH near 14, while weaker bases have a pH around 9.

Let’s test how pH strips change color with different substances.

Take one glass each of lemon juice, baking soda solution, and distilled water.

Next, dip a pH strip into each glass.

Lemon juice turns the strip orange, indicating a pH of 2 and a strong acidic nature.

The baking soda solution turns the strip light blue, indicating a pH of around 9, which is slightly basic.

Distilled water turns the strip green, confirming a neutral pH of 7, which means it is neither acidic nor basic.