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Chemical Weathering
dissolving of limestone by acid rain
Rocks that are rich in the mineral Calcite, such as limestone, are especially vulnerable to chemical weathering.
Normal rain (slowly) and acid rain (rapidly) both weather limestone.
Carbonic acid is the name of the compound H2C03.
The dissolution of limestone by rainwater containing carbonic acid is the perfect example of chemical weathering.
This is chemical weathering. Carbonic acid (and often sulphuric acid from SO2) destroy CaCO3 (limestone) through chemical attack.Carbonic acid is formed by reaction of H2O and CO2 to create H2CO3.
Carbon dioxide dissolved in water is a cause of chemical weathering.
Carbonic acid reacts chemically with limestone, which is observed as weathering. As such, carbonic acid weathering is a chemical, not physical, change.
Chemical Weathering
Principally chemical as the limestone is dissolved by carbonic acid (rain-water acidified by absorbed atmospheric CO2). As the cave develops mechanical weathering of its stream-passages may contribute, by abrading the rock with sand carried in the stream.
Groundwater dissolves limestone, which causes sinkholes to form
Karst topography is formed by chemical weathering, and affects the underlying carbonate rock (limestone or dolomite). This occurs under specific drainage conditions. Slightly acidic water (carbonic acid in solution) is the active agent.
type of weathering represented by dissolution of lime stone in acid is known as chemical weathering and is mainly expirienced in coastal regions as rain water dissoves CO2 in the air forming a weak carbonic acid which then dissolves limestone in the area in the process of chemical weathering and it results in the formation of karst scenary.
it is chemical weathering
Groundwater causes chemical weathering by speeding reactions between reactive materials. Typical would be an oxidizing reaction, such as the formation of rust in rocks containing iron, or the dissolution of limestone by carbonic acid.
In all limestone caves, the same as as is "evident" - by the cave's very existence - as in all the limesrtone caves and other karst features in your country - chemical weathering! (Dissolution by carbonic acid.)