Question

Name the scientist who developed the pH scale.

Answer 1

We know that the degree of alkalinity or acidity of a solution is known as its pH. pH is the negative logarithm of the hydrogen ion concentration. pH of a solution is determined using the pH scale

Complete solution:
We know that a pH scale is used to determine the acidic or basic nature of the substance. The pH scale ranges from 0 to 14.
If the pH of the solution is less than 7 then the solution has acidic nature. If the pH of the solution is more than 7 then the solution has basic nature. If the pH of the solution is equal to 7 then the solution is neither acidic nor basic it is neutral in nature.
Sometimes pH value can be less than 0. This indicates that the solution is highly acidic. Also sometimes the pH value can be more than 14. This indicates that the solution is highly alkaline.
pH is defined as the negative logarithm of the hydrogen ion concentration. The equation to calculate pH is as follows:
${\text{pH}} = - \log [{{\text{H}}^ + }]$
The scientist who developed pH scale is Sorenson. The pH scale is as follows:

The various colours are observed at the pH value on pH paper.
Thus, the scientist who developed pH scale is Sorenson.

Note: pH scale is used to rank the solutions in terms of basicity or acidity. Other ways to measure pH are pH paper, indicators, etc. Lemon juice is acidic in nature. Sodium hydroxide is basic in nature. Distilled water is neutral in nature.