when is colorimetric method used in the determination of soil pH?

Answer 1

There are several methods used to measure pH. Two of the simplest are litmus paper and liquid acid-base indicators. The most widely used method is the pH meter. These meters are easy to use and very accurate. When chemists want to measure the amount of alkali or acid in a solution, they use a process called, titration. Titration measures the amount of alkali and/or acid in a solution. pH measures the concentration of hydrogen ions present in a solution. Both are important.

Most pH values are measured either by electrometric determination (pH meter) or by colorimetric methods with the aid of indicator solutions or indicator papers. The pH meter determines a precise pH with the aid of a suitable electrode submerged in the unknown solution. A direct and immediate reading is registered on the pH meter scale. The pH of a solution may also be determined by adding a few drops of indicator solution to the unknown solution. The resultant color of the mixture is then compared with a reference scale. Special high class filter papers impregnated with suitable indicator solutions can be submerged into the unknown solution and the resultant color of the paper is compared with a reference scale. The indicator papers are a simple method of determining a broad assay of acidity or alkalinity. They are not as precise as the other methods.

Answer 2

Determination Of Soil Ph

Answer 3

what?