An acid is a substance which, in dissolution, increases and increases the concentration of hydrogen ions. In combination with the bases, an acid to form salts. On the other hand, the concept of acid (which comes from the latin acĭdus) means which has a bitter taste or like vinegar.
There is a large amount of acids. Acetic acid, for example, is a colourless liquid of pungent odour which occurs through oxidation of ethyl alcohol and which is used in the synthesis of chemical products.
Acrylic acid is soluble in water, easily form polymers and is applied in the production of plastics and paints.
Benzoic acid, on the other hand, is a solid which is used in the pharmacy sector. Boric acid for antiseptic and industrial purpose, is another strong acid.
Some acids are gas, such as hydrochloric acid, formed by chlorine and hydrogen. It is a corrosive substance obtained from common salt, which is usually used to be dissolved in water.
Citric acid, on the other hand, is contained in many fruits, such as lemon. It has a bitter taste and is very soluble in water.
Deoxyribonucleic acid is the one which is the genetic material of the cells and which presents, in its sequence information for protein synthesis.
Disinfection (fennique acid, salicylic acid), engraving on glass (hydrofluoric acid) and dyeing (tartaric acid) are other possible applications to existing acids.