Excessive production of stomach acid during indigestion can cause pain and irritation.

Antacids, which are bases, neutralize excess stomach acid, relieving pain and irritation.

Magnesium hydroxide, also known as Milk of Magnesia, is often used as a mild base for neutralizing excess stomach acid and relieving indigestion.

Living organisms can only survive within a narrow pH range because significant deviations can disrupt physiological processes essential for life.

The atmosphere of Venus is composed of thick white and yellowish clouds of sulfuric acid.