The pH scale measures how strongly acidic or alkaline ... This indicates a pH value of 7 and tells us that water is neither alkaline or acid, but neutral. Acidic solutions have pH values less ...

When an acid is added to an alkali the pH of the acid increases towards 7 and the pH of the alkali decreases towards 7.

Soil pH or soil reaction is an indication of the acidity or alkalinity of soil and is measured in pH units. Soil pH is defined as the negative logarithm of the hydrogen ion concentration. The pH scale ...