Скачать или смотреть How to measure pH by pH paper

Measuring pH using pH paper is a simple and inexpensive way to determine the acidity or alkalinity of a solution.

Here are the general steps to follow:

Obtain pH paper that is specifically designed for the range of pH you wish to measure.
Dip the pH paper into the solution you wish to test, or if testing a solid, place a small amount of the solid on the paper.
Remove the pH paper from the solution and compare the color of the paper to the color chart provided with the pH paper.
The color of the pH paper will change depending on the acidity or alkalinity of the solution. The color chart will have a range of colors, each corresponding to a specific pH value.
Match the color of the pH paper to the closest color on the chart, and read the corresponding pH value.
It's important to note that pH papers come in a wide range of pH range and sensitivities, you need to make sure that you are using a paper with the appropriate range for your sample. Also, keep in mind that this method is not as accurate as using pH meters but it's a good way to get a general idea of the pH of a sample.