Describe the scale used to measure the acidity of a substance. Demonstrate how you could differentiate a weak acid from a strong one.

The scale used to measure the acidity of a substance is pH.

Explanation:

The scale used to measure the acidity of a substance is pH.

The pH scale measures how acidic a substance is.

The value of pH scale ranges from 0-14

The substance having pH value = 0 is considered strong acidic and the substance having pH value = 6 is considered weak acid.

So, pH values from 0-6, 0 being strong acid and 6 being weak acid. The acidity decreases as we move from left to right i. e, from pH = 0 to pH = 6