In exposed areas of buildings and statues we see roughened surfaces removal of material and loss of carved details.
Marble and acid reaction.
12 marble samples buffered solutions of ph 4 5 and 6 900 ml each 900 ml.
Powdered marble reacts with hydrochloric acid to release bubbles of carbon dioxide gas.
How does this happen.
Sulphuric acid is a compound it is not sulfur dioxide and water the formula is h2so4sulphuric acid is the product of the chemical reaction that occurs when sulfur trioxide and water are mixed.
When sulfurous sulfuric and nitric acids in polluted air and rain react with the calcite in marble and limestone the calcite dissolves.
Wipe all acid off the rock sample with a paper towel.
Stone surface material may be lost all over or only in spots that are more reactive.
Prediction when the concentration of acid increases more gas will be given off faster.
The balanced equation is.
If the acid only makes the rock wet wipe the rock with a paper towel and go back to homogeneous looking rocks.
If the acid fizzes on your sample your rock is probably marble.
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How does acid precipitation affect marble and limestone buildings.
Finding the rate of reaction of marble chips and hydrochloric acid changing the surface area duration.
Change in mass of marble samples marble sample with application of distilled water ph 4 5 6 and distilled water materials.
Marble is mostly calcium carbonate caco3 so when it react with nitric acid hno3 the products will be calcium nitrate carbon dioxide which effervesces and water.
A chemical reaction equation 9 between calcium carbonate and sulfuric acid the primary acid component of acid rain results in the dissolution of caco 3 to give aqueous ions which in turn are washed away in the water flow.
Marble chips and hydrochloric acid rates of reaction planning aim to find if changing the concentration of an acid will increase or decrease the rate of the reaction when marble is dissolved in hydrochloric acid.
Students know buffers stabilize ph in acid base reactions.