Question

Give the preparation properties and uses calcium calcium carbonate

Answer 1

Good afternoon my friend,

PREPARATION of CaCO3:
CaO+CO2--------->CaCO3

PROPERTIES of CaCO3:
It is basic in nature.

USES of CaCO3:
It is used for white washing.
It is used for preparation of chalk.

Answer 2

${\underline{\overline{\bf{\mid{Calcium \:Carbonate}\mid}}}}$

Preparation:—

• Calcium carbonate occurs in nature in several forms like limestone, marble, chalk etc.
• It can be prepared by passing carbon dioxide through slaked lime.$\sf{Ca(OH)_{2}+CO_{2}\longrightarrow CaCO_{3}+H_{2}O}$
• It can be also prepared by addition of sodium Carbonate to calcium chloride.$\sf{CaCl_{2}+Na_{2}CO_{3}\longrightarrow CaCO_{3}+2NaCl}$
• Note:- Acess of carbon dioxide should be avoided since this leads to the formation of water soluble calcium hydrogencarbonate.

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Properties:—

• Calcium Carbonate is a white fluffy powder.
• It is insoluble in water.
• Calcium Carbonate when heated to 1200 K , it decomposes to evolve Carbon dioxide.$\sf{CaCO_{3}\longrightarrow CaO+CO_{2}}$
• It reacts with dilute acid to liberate carbon dioxide. $\sf{CaCO_{3}+2HCl\longrightarrow CaCl_{2}+H_{2}O+CO_{2}}$

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Uses:—

• It is used as a building material in the form of marble.
• It is used in manufacturing of quick lime.
• Calcium Carbonate along with magnesium carbonate is used as a flux in the extraction of metal such as iron.
• It is also used in manufacturing of high quality papers.
• Moreover, used as an antacid, mild abrasive in toothpaste, a constituent of chewing gum.

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