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, and promotes chemical reactions (acid catalysis). The solid matter ejected by a volcano covers all rock compositions from basic to acid. The definition of an acid has changed as people discovered more about chemistry
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Acids were originally grouped together by their properties
They taste sour, change the color of litmus paper to red, and make salts when reacted with certain other chemicals.
For example, hydrochloric acid (hcl) is an acid because it forms h a + when it dissolves in water Hcl (g) water h + (aq) + cl (aq) 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.
In an operational sense, an acid is any substance that increases the concentration of the h + ion when it dissolves in water 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 reaction that forms a salt. 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 substances that can release hydrogen ions (h⁺) in water, and they play a key role in countless chemical reactions.
