alkalá

Alkálá is the Portuguese term for "alkali," referring to a class of chemical substances characterized by their high reactivity and basic (alkaline) properties. These substances typically have a pH greater than 7 when dissolved in water. Alkalis are generally soluble in water, producing hydroxide ions (OH−), which contribute to their basic nature.

Common examples of alkalis include sodium hydroxide (NaOH), potassium hydroxide (KOH), and calcium hydroxide (Ca(OH)2). They are widely used in various industrial processes, such as soap making, paper manufacturing, and chemical synthesis, as well as in household cleaning products, due to their ability to break down organic materials and grease.

In nature, alkalis are found in mineral deposits and soils containing alkaline earth metals. They play an essential role in environmental chemistry and are involved in buffering systems that regulate pH levels in biological and ecological systems.

Handling alkalis requires caution, as they are corrosive and can cause burns or damage to skin and eyes upon contact. Proper safety equipment and procedures are advised when working with these substances.

The term “alkalá” is primarily used in Portuguese and other Romance languages with Latin roots to denote substances with these basic properties. Understanding alkalis is fundamental in chemistry, environmental science, and various industrial applications.