Question

Four ways/methods used to measure the pH

Answer 1

Answer:

The methods for measuring pH fall roughly into the following four categories:

Indicator methods.

Metal-electrode methods (including the hydrogen-electrode method, quinhydron-electrode method and antimony-electrode method)

Glass-electrode methods.

Semiconductor sensor methods

Answer 2

Answer:

Here

Explanation:

1. Measurement of approximate ph range

Red and blue litmus paper

2.measurement of approximate ph value

pH paper and universal indicator

3. measurement of exact ph value

An instrument known as ph meter,which has two electrodes which are dipped in solution