Definition: The word "achlorhydric" comes from Greek and means "acidic", referring to the presence of acids in a substance, which are usually salts, organic acids, or mineral acids. The term "achlorhydric" refers specifically to aqueous solutions with acidic pH values. These solutions contain a large amount of hydronium ions (H3O+), which form an ionic bond between the water molecules and the cations (H+) or anions (OH-). The presence of acids in these solutions indicates that they are prepared by dissolving organic compounds, minerals, or other substances. Understanding the definition of "achlorhydric" can help individuals understand how different types of aqueous solutions with acidic pH values are typically produced. For example, acetic acid is a common chemical used as an emulsion solvent in cosmetics and skincare products because it has a high pH value of 3.8 to 4.0. It dissolves readily in water and forms hydrogen peroxide (H2O2), which is then absorbed into the skin or clothing through small pores, creating a pleasant fragrance. Understanding acetic acid's role in such applications can also help people better understand how acids are used for various purposes in chemistry, medicine, and industry.
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