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Fudgin [204]
2 years ago
8

When an alkaline earth carbonate is heated, it releases CO₂, leaving the metal oxide. The temperature at which each Group 2A(2)

carbonate yields a CO₂ partial pressure of 1 atm is Carbonate Temperature (°C)MgCO₃ 542CaCO₃ 882SrCO₃ 1155BaCO₃ 1360(b) Mixtures of CaCO₃ and MgO are used to absorb dissolved silicates from boiler water. How would you prepare a mixture of CaCO₃ and MgO from dolomite, which contains CaCO₃ and MgCO₃?
Chemistry
1 answer:
Kruka [31]2 years ago
8 0

We can prepare CaCO₃ and MgO from dolomite.

<h3 /><h3>What is Dolomite?</h3>
  • Common rock forming mineral is called dolomite.
  • It's chemical composition is CaMg(CO₃)₂.
  • The component of the sedimentary rock is called dolostone.
  • It is the primary component of the metamorphic rock known as dolomitic marble.
  • Limestone that contains some dolomite is known as dolomitic limestone.

Dolomite is a mineral which is rarely found in the environment , but dolostones are the minerals which are very commonly found.

<h3>Properties of Dolomite:</h3>
  • The trigonal-rhombohedral system is used to crystallise dolomite
  • It forms crystals that are white, tan, green, or pink in colour.
  • Dolomite is a double carbonate of calcium and magnesium ions arranged in an alternating structural structure.
  • Granular dolomite is a medium to dark grey, brown, or white granular dolomite found in rocks.
  • The lustre varies from dull to subvitreous. Dolomite, like calcite, cleaves into six-sided polyhedrons with diamond-shaped faces.
  • Dolomite vein grains may be several centimetres in diameter.
<h3>Uses of Dolomite:</h3>
  • Ornamental stone is used as Dolomite, and a magnesium oxide source, as well as used in the Pidgeon magnesium production process.
  • Dolomite is often used in place where calcite limestone is used as as a flux for the smelting of iron and steel when calcite limestone is not available or very expensive.
  • Therefore, it is also called dolomite limestone.
  • Dolomite and dolomitic limestone are often used in horticulture as a pH buffer and magnesium source in soils .
  • Calcined dolomite is also used as a catalyst invery high-temperature gasification of biomass in order to kill tar.
<h3>Preparation of  CaCO₃ and MgO from dolomite:</h3>
  • Dolomite is a double salt which consists of calcium carbonate (CaCO3) and magnesium carbonate (MgO) and it is one of the two forms of limestone.
  • This dolomite is  found in the Bangkalan area, which only used in landfill and used to make light stone. Existence the great potential for dolomite as a biomaterial then in this research was carried by making CaCO3/MgO from dolomite using a simple calcination method at 600°C, 700°C and 800°C for one hour From the results of XRD found that the CaCO3/MgO phase was formed optimally at a temperature of 700°C.

Thus from the above conclusion we can say that, we can prepare CaCO₃ and MgO from dolomite.

Learn more about Dolomite here :brainly.com/question/10283539

#SPJ4

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