What is the pH of the baking soda solution

The PH value is defined as the negative decadic logarithm of the hydronium ion concentration. You will find out exactly what that means in the course of this article. Conceptually, the abbreviation "pH" is derived from the Latin 'potentia Hydrogenii' (potentia = force; Hydrogenium = hydrogen).

The pH value indicates on a scale from 0-14 how strong an aqueous solution is angry or alkaline / basic is. Values ​​from 0 to approx. 6.5 are to be assessed as acidic. Pure water has a pH of 7 and is considered neutral. Values ​​between 7.5-14, on the other hand, are alkaline / basic. Values ​​below zero or above 14 are also possible, but hardly affect the practical area of ​​application.

 
With the help of a pH indicator, the pH value of a liquid can be determined quickly and easily. To do this, add the pH indicator to a small amount of the desired liquid. This discolors the liquid, depending on the pH value in the solution. However, the above color scale cannot be used as a standard for determination, since the colors always depend on the respective indicator liquid. There are different indicators with different color spectra. A popular indicator liquid for approximate determination is e.g. red cabbage juice, which is often used in chemistry classes.