The pH scale goes from 0 to 14 with pH 7 as the neutral ... that are held in the organic matter. Soils tend to become acidic as a result of: (1) rainwater leaching away basic ions (calcium, magnesium, ...

If you add an acid to a base, the same thing happens. “Neutralization” moves acidic or basic materials toward the middle of the scale. Cochineal dye is orange when it’s in an acidic environment, red ...