Soil pH is defined as the negative logarithm of the hydrogen ion concentration. The pH scale goes from 0 to 14 with pH 7 as the neutral point. As the amount of hydrogen ions in the soil increases the ...

If universal indicator is added to a solution it changes to a colour that shows the pH of the solution. Universal indicator is a mixture of a variety of other indicators and can be used to measure ...

The pH scale shows how acidic a substance is ... Reactions of metals with acids Acids react with some metals to produce salts and hydrogen. The salt name can be found from the name of the acid ...