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carbonic acid

American  

noun

  1. the acid, H 2 CO 3 , formed when carbon dioxide dissolves in water, known in the form of its salts and esters, the carbonates.

carbonic acid British  

noun

  1. a weak acid formed when carbon dioxide combines with water: obtained only in aqueous solutions, never in the pure state. Formula: H 2 CO 3

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
carbonic acid Scientific  
/ kär-bŏn′ĭk /

  1. A weak, unstable acid present in solutions of carbon dioxide in water. It gives carbonated beverages their sharp taste. Chemical formula: H 2 CO 3 .

Etymology

Origin of carbonic acid

First recorded in 1785–95

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Carbonic acid, H2CO3, is an example of a weak diprotic acid.

From Textbooks • Feb. 14, 2019

Carbonic acid is an important agent in two chemical weathering reactions, hydrolysis, and dissolution.

From Textbooks • Jan. 1, 2017

Carbonic acid levels in the blood are controlled by the expiration of CO2 through the lungs.

From Textbooks • Jun. 19, 2013

Carbonic acid gas in the water greatly hastens the dissolving of dead shells.

From Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place by Rogers, Julia Ellen

Carbonic acid gas: a gas consisting of carbon and oxygen.

From Agriculture for Beginners Revised Edition by Burkett, Charles William

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.