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

    Dec 12, 2025 · An acid is any substance that in water solution tastes sour, changes blue litmus paper to red, reacts with some metals to liberate hydrogen, reacts with bases to form salts, …

  2. ACID Definition & Meaning - Merriam-Webster

    The meaning of ACID is a sour substance; specifically : any of various typically water-soluble and sour compounds that in solution are capable of reacting with a base to form a salt, redden …

  3. 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.

  4. 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 …

  5. ACID definition and meaning | Collins English Dictionary

    An acid is a chemical substance, usually a liquid, which contains hydrogen and can react with other substances to form salts. Some acids burn or dissolve other substances that they come …

  6. What Is an Acid in Chemistry? | The Chemistry Blog

    Sep 24, 2025 · What Is an Acid in Chemistry? Acids are one of the most important groups of chemicals, found everywhere from household products to industrial processes. They are …

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

    Feb 14, 2023 · In chemistry, an acid is a chemical species that donates hydrogen ions or protons or accepts an electron pair. Acids react with bases and some metals via a neutralization …

  8. 6.1: What is an Acid and a Base? - Chemistry LibreTexts

    An acid is a substance that forms hydrogen ions H + when dissolved in water, and A base is a substance that forms hydroxide ions OH - when dissolved in water. For example, hydrochloric …

  9. ACID | English meaning - Cambridge Dictionary

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

  10. 2 People Hospitalized After 1 Million Gallons of Sulfuric Acid

    1 day ago · Two people were hospitalized after about 1 million gallons of sulfuric acid spilled from a tank in an industrial storage facility in Texas. The incident occurred in the early morning …