what is acid, type of acid
Answers
Answer:
Acids are common in daily life. ... Common strong acids include hydrochloric acid, sulfuric acid, phosphoric acid, and nitric acid. Common weak acids include acetic acid, boric acid, hydrofluoric acid, oxalic acid, citric acid, and carbonic acid.
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An acid is a chemical species that donates protons or hydrogen ions and/or accepts electrons. Most acids contain a hydrogen atom bonded that can release (dissociate) to yield a cation and an anion in water. The higher the concentration of hydrogen ions produced by an acid, the higher its acidity and the lower the pH of the solution.The word acid comes from the Latin words acidus or acere, which mean "sour," since one of the characteristics of acids in water is a sour taste (e.g., vinegar or lemon juice).
This table offers an overview of the key properties of acids compared with bases.
Arrhenius, Brønsted-Lowry, and Lewis Acids
There are different ways of defining acids. A person referring to "an acid" is usually referring to an Arrhenius or Brønsted-Lowry acid. A Lewis acid is typically called a "Lewis acid." The reason for the differing definitions is that these different acids don't include the same set of molecules:
Arrhenius Acid: By this definition, an acid is a substance that increases the concentration of hydronium ions (H3O+) when added to water. You might also consider increasing the concentration of hydrogen ion (H+) as an alternative.
Brønsted-Lowry Acid: By this definition, an acid is a material capable of acting as a proton donor. This is a less restrictive definition because solvents besides water are not excluded. Essentially, any compound that can be deprotonated is a Brønsted-Lowry acid, including typical acids, plus amines, and alcohol. This is the most widely used definition of an acid.
Lewis Acid: A Lewis acid is a compound that can accept an electron pair to form a covalent bond. By this definition, some compounds that don't contain hydrogen qualify as acids, including aluminum trichloride and boron trifluoride.
Acid Examples
These are examples of types of acids and specific acids:
Arrhenius acid
Monoprotic acid
Lewis acid
Hydrochloric acid
Sulfuric acid
Hydrofluoric acid
Acetic acid
Stomach acid (which contains hydrochloric acid)
Vinegar (which contains acetic acid)
Citric acid (found in citrus fruits)
Strong and Weak Acids
Acids may be identified as either strong or weak based on how completely they dissociate into their ions in water. A strong acid, such as hydrochloric acid, completely dissociates into its ions in water. A weak acid only partly dissociates into its ions, so the solution contains water, ions, and the acid (e.g., acetic acid).
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