Essay On Calcium Carbonate

calcium carbonate , commonly known as limestone , limestone , stone powder which have :

Molecular formula: CaCO3

Molecular Weight: 100.09

Calcium carbonate, also known as limestone and powder, is a common chemical substance on the earth. It belongs to inorganic salt minerals. It is alkaline, hardly soluble in water, and easily soluble in acid. It naturally exists in vermiculite, calcite, chalk, limestone, In rocks such as marble and limestone, insoluble calcium carbonate and water dissolved in carbon dioxide in the limestone layer can be converted into calcium bicarbonate, and calcium carbonate dissolved in water can also precipitate calcium carbonate. This is the reason for the formation of caverns.White solid, odorless, odorless. There are two forms of amorphous and crystalline.

This method is used for carbonate analysis in the soil and composed of two-phase analysis:

1) The soil is mixed with a known amount of hydrochloric acid (HCl) using the dissolution of calcium carbonate

CaCO3 and creating calcium chloride (CaCl2), water and carbon dioxide.

CaCO3 + 2HCl→CaCl2 + H2O+ CO2

2) The amount of acid left is measured by titrating it with sodium hydroxide (NaOH) to produce sodium chloride

(NaCl) and water, adding phenolphthalein indicator to the solution causes it to turn pink when all the acid have reacted.

1. An effective stimulator of human respiration. It stimulates respiratory palsy through stimulation of human chemoreceptors. If a person inhales pure oxygen for a long time, the concentration of carbon dioxide in the body is too low, which can lead to respiratory arrest. Therefore, clinically, a mixture of 5% carbon dioxide and 95% oxygen is used in the treatment of carbon monoxide poisoning , drowning , shock, alkalosis, and anesthesia. The use of liquid carbon dioxide cryosurgery is also widely