There are two methods to test the pH value of ammonium metatungstate: pH meter and pH test paper.
A pH meter is an instrument that converts the potential of the pH value into a digital output. It is mainly composed of a pH meter electrode, a potentiometer, and a circuit board. When testing the pH value, first immerse the electrode of the pH meter in the current test substance, wait for the instrument to stabilize and read the number output by the instrument, and then the pH value of the substance can be obtained.
PH test paper is a test method in which the test substance is immersed in the test paper, and the pH value of the substance is judged according to the apparent degree of discoloration on the test paper. When using PH test paper, soak the test paper in the substance to be tested, wait for a while, take out the test paper and compare its color change, and then you can know the pH value of the substance through the mark on the test paper package.
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