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How carbon dioxide from the atmosphere becomes calcium carbonate in rocks?
Carbon dioxide from the atmosphere can dissolve in water, forming carbonic acid. This acid reacts with minerals, particularly calcium, to produce calcium bicarbonate. Over time, as water evaporates or conditions change, calcium bicarbonate can precipitate out of solution, forming solid calcium carbonate. This process contributes to the formation of limestone and other sedimentary rocks.
Why is acid making limestone fizz a chemical change?
When acid reacts with limestone, it causes a chemical reaction that results in the formation of new substances. This transformation is considered a chemical change because the original properties of the limestone and acid are altered, forming new chemical compounds. The fizzing is often a visual sign of this chemical reaction taking place.
Two colorless solutions were mixed. a yellow precipitate was formed.what possible reactants were mixed and what was the yellow coloured precipitate formed due to?
The possible reactants could be sodium thiosulfate and silver nitrate, forming a yellow precipitate of silver sulfide. Another possibility is mixing potassium chromate and lead(II) nitrate, forming a yellow precipitate of lead chromate.
Can dissolve limestone when mixed with water?
Limestone can dissolve in water when it is mixed with carbon dioxide, forming carbonic acid. This weak acid reacts with the calcium carbonate in limestone, leading to its dissolution. This process is a key factor in the formation of caves and karst landscapes. Additionally, acidic rainwater can also enhance the dissolution of limestone.
Do rainwater cause fissures and caves in limestone?
Yes, rainwater can cause fissures and caves in limestone through a process called chemical weathering. As rainwater falls, it absorbs carbon dioxide from the atmosphere and soil, forming a weak carbonic acid. This acidic water seeps into cracks in the limestone, gradually dissolving the rock and leading to the formation of fissures and, eventually, larger caves over time. This process is a key mechanism in the development of karst landscapes.
What reacts with lime water forming a precipitate?
Carbon dioxide reacts with lime water (calcium hydroxide solution) forming calcium carbonate as a white precipitate.
What happens when acid reacts with limestone?
When acid reacts with limestone, a chemical reaction occurs where the acid dissolves the calcium carbonate in the limestone, forming water, carbon dioxide, and a calcium salt. This reaction is known as neutralization and can result in the limestone dissolving or fizzing as the carbon dioxide gas is released.
What type of weathering occurs when limestone is eaten away by chemicals in water?
Chemical weathering occurs when limestone is dissolved by chemicals in water. This process, known as carbonation, is caused by the reaction of carbon dioxide in rainwater with the calcium carbonate in limestone, forming calcium bicarbonate which is soluble in water.
What are the four possible outcomes of mixing two chemicals in solution?
- forming a homogeneous solution- forming a precipitate by chemical reaction- sedimentation of an insoluble phase, without chemical reaction
Chemical weathering processes are particularly effective on limestone landscapes forming?
Chemical weathering processes such as carbonation and hydration are particularly effective on limestone landscapes, forming features like caves, sinkholes, and karst topography. These processes involve the dissolution of calcium carbonate in limestone by acidic groundwater, leading to the creation of unique geological formations over time.
What reacts with water to produce limestone caves?
Carbon dioxide dissolves in water forming carbonic acid H2CO3, a weak acid that slowly erodes the limestone.
What happens when you add an acid limestone?
Limestone is mainly composed of calcium carbonate. It will react with acids to produce carbon dioxide, a salt and water, and the limestone will slowly dissolve away - an experiment easily performed by pouring vinegar on a piece of limestone. In the outdoors: Acid rain (from industrial pollution mixing with falling rain) cause limestone to dissolve, increasing the natural effect of rain water erosion of rock - forming potholes, caverns - and clints and grykes (fissures) on 'limestone pavements'.
Why is acid making limestone fizz a chemical change?
When acid reacts with limestone, it causes a chemical reaction that results in the formation of new substances. This transformation is considered a chemical change because the original properties of the limestone and acid are altered, forming new chemical compounds. The fizzing is often a visual sign of this chemical reaction taking place.
What is calcite?
Calcite is a carbonate mineral with the chemical formula CaCO3, which is a major rock forming mineral, particularly of limestone.
How does limestone erode?
Limestone erodes through a combination of chemical weathering and physical processes. Rainwater and carbon dioxide in the atmosphere react with the calcium carbonate in limestone, forming a weak acid that dissolves the rock over time. Additionally, physical processes like abrasion and freeze-thaw cycles can break down limestone into smaller particles.
Two colorless solutions were mixed. a yellow precipitate was formed.what possible reactants were mixed and what was the yellow coloured precipitate formed due to?
The possible reactants could be sodium thiosulfate and silver nitrate, forming a yellow precipitate of silver sulfide. Another possibility is mixing potassium chromate and lead(II) nitrate, forming a yellow precipitate of lead chromate.
How does clay turn into limestone?
Clay can turn into limestone through a process called diagenesis, where the clay particles are subjected to compaction and cementation, forming a new rock material. Over time, the minerals in the clay are altered and precipitate out to form calcium carbonate, which is the primary mineral in limestone.
