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  1. Acid | Definition, Examples, Types, Uses, & Facts | Britannica

    Dec 12, 2025 · What is an acid, as defined in chemistry? An acid is any substance that in water solution tastes sour, changes blue litmus paper to red, reacts with some metals to liberate …

  2. Acid - Simple English Wikipedia, the free encyclopedia

    The definition of an acid has changed as people discovered more about chemistry. Acids were originally grouped together by their properties: they taste sour, change the color of litmus …

  3. ACID Definition & Meaning - Merriam-Webster

    It’s made with nourishing and hydrating ingredients including a seven-hyaluronic-acid blend to really moisturize skin, Brazilian nut oil with nourishing vitamin E components, and Brazilian …

  4. ACID Definition & Meaning | Dictionary.com

    An acid is the opposite of a base and has a pH of 0 to 7. A given amount of an acid added to the same amount of a base neutralizes the base, producing water and a salt.

  5. What Is an Acid? Definition, Examples, and pH Scale

    Jul 30, 2025 · Acids are defined by their behavior in solution. One common definition, known as the Brønsted-Lowry theory, describes an acid as a substance capable of donating a proton, a …

  6. What Is an Acid in Chemistry? Definition and Examples

    Feb 14, 2023 · Learn what an acid is in chemistry. Get the acid definition and examples and learn about the properties of these compounds.

  7. Acids – Definition, Types, Examples, Properties, Uses

    Jul 10, 2024 · In simple terms, acids are substances that taste sour and can turn blue litmus paper red, indicating their acidic nature. They’re known for their ability to react with bases to …

  8. ACID | definition in the Cambridge English Dictionary

    Basic rocks with no quartz tend to be dark-colored, while acid rocks are much lighter. The solid matter ejected by a volcano covers all rock compositions from basic to acid.

  9. Organic acid - Wikipedia

    Organic acid ... An organic acid is an organic compound with acidic properties. The most common organic acids are the carboxylic acids, whose acidity is associated with their carboxyl group …

  10. Acid Definition & Meaning | Britannica Dictionary

    ACID meaning: 1 : a chemical with a sour taste that forms a salt when mixed with a base; 2 : lsd