Science Questions

What happens when acid reacts with limestone?

Sun, 15th Jun 2008

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Question

Joyce asked:

What happens in a reaction between acid rain and limestone?

Answer

Limestone is mostly made up of the mineral calcium carbonate (CaCO3). This is not very soluble, Limestoneso the rocks don't dissolve very quickly. But if you add an acid, you add hydrogen ions (H+), which will react with the carbonate to form hydrogen carbonate HCO3- ions, which are very soluble in water, and the limestone will dissolve. Or, if there is more acid, about the two hydrogen ions will react with a carbonate to form carbonic acid - H2CO3 - which will decompose to form carbon dioxide - CO2 - and water H2O.

The acid can come from a variety of sources: sulphur and nitrogen oxides released by burning fossil fuels will form sulphuric and nitric acids, and carbon-dioxide can dissolve in water to form carbonic acid.

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Limestone is CaCO3. An acid (H+) reacts with it giving water (H2O) and carbon dioxide (CO2):

CaCO3 + 2H+ --> Ca++ + H2O + CO2 lightarrow, Sun, 11th May 2008

uh... i tink that this is one of the more confusing tingys SCIENCE NERD12123, Wed, 19th Jan 2011

it will desolve over 10 years (really slowly) emilyimonly11, Sun, 18th Mar 2012

Speak English please XD, no seriously this is confusing. You need to speak less crazy talk and more real because you are wrong. I know because half of the stuff people research about acid dissolving limestone rocks are FACTS that I wrote and I'm only 11. It's a shame that I know more than you! No hard feeling bro, and DEFINITELY on offense! :) Martin Tomphson, Sat, 4th Oct 2014

Speak English please XD, no seriously this is confusing. You need to speak less crazy talk and more real because you are wrong. I know because half of the stuff people research about acid dissolving limestone rocks are FACTS that I wrote and I'm only 11. It's a shame that I know more than you! No hard feeling bro, and DEFINITELY on offense! :) Martin Tomphson, Sat, 4th Oct 2014

What is the name of this reaction? Alex Bruckner, Fri, 22nd Apr 2016

is it possible to react limestone with 98% sulphuric acid for gypsum production? Keorapetse, Mon, 10th Oct 2016

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