Acid rain contains carbonic nitric and sulfuric acid that are produced by oxidation and dissolution in water of gaseous oxides co 2 no 2 and so 2 present in the air as chemical pollutants.
Acid rain reaction with marble.
Caco 3 s h 2 so 4 aq caso 4 s co 2 g h 2 o l.
Caco 3 h 2 so 4 caso 4 h 2 o co 2 the formation of calcium sulphate results in the corrosion of this beautiful monument.
How does acid precipitation affect marble and limestone buildings.
Acid rain can damage buildings historic monuments and statues especially those made of rocks such as limestone and marble that contain large amounts of calcium carbonate.
The damage that acid rain does to limestone and marble buildings and sculptures is due to a classic acid base reaction.
In exposed areas of buildings and statues we see roughened surfaces removal of material and loss of carved details.
Acid rains are one of the main degradation agents for marble artifacts.
For example a dramatic increase in the acidity of rain and snow over the past 150 years is dissolving marble and limestone surfaces accelerating the corrosion of metal objects and decreasing the ph of natural waters.
Acid base reactions can have a strong environmental impact.
Students know how to calculate ph from hydrogen ion concentration.
Students know buffers stabilize ph in acid base reactions.
When sulfurous sulfuric and nitric acids in polluted air react with the calcite in marble and limestone the calcite dissolves.
Acid precipitation affects stone primarily in two ways.
Marble and limestone both consist of calcium carbonate caco 3 a salt derived from the weak acid h 2 co 3.
A chemical reaction equation 9 between calcium carbonate and sulfuric acid the primary acid component of acid rain results in the dissolution of caco.
Stone surface material may be lost all over or only in spots that are more reactive.
What effect does acid rain have on marble.
Marble like all calcareous rocks is particularly sensitive to degradation by acid chemicals and to weathering.
How does this happen.
Students know how to use the ph scale to characterize acid and base solutions.
When sulfurous sulfuric and nitric acids in polluted air and rain react with the calcite in marble and limestone the calcite dissolves.
Although these are recognized as highly durable materials buildings and outdoor monuments made of marble and limestone are now being gradually eroded away by acid rain.
The reaction of a strong acid with a salt of a weak acid goes to completion.
Acid rain effects on buildings acids have a corrosive effect on limestone or marble buildings or sculptures.
