Stomach acid turns universal indicator paper a strong ... This is measured using the pH scale, which runs from pH 0 to pH 14. Universal indicator has many different colour changes, from red ...

These fascinating science facts prove that reality is often stranger—and a lot more interesting—than fiction These ...

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 ...

Acidity occurs when there is an excess secretion of acids in the gastric glands of the stomach, producing gas, bad breath, stomach ache and other symptoms. This humble spice works as a natural antacid ...