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Carbon Dioxide

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Q: What gas is evolved from the decomposition of calcium carbonate?
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Is the decomposition reaction of calcium carbonate in an open container reversible or irreversible?

The decomposition of calcium carbonate in an open container is irreversible, because one of the decomposition products, carbon dioxide, is a gas, and since the container is open, this gas will mix with the natural atmosphere and never develop sufficient local partial pressure to reverse the reaction.


What gas is given off when a piece of marble or limestone is heated?

The gas is Carbon dioxide, formed by the decomposition of Calcium carbonate it the Marble or Limestone


Why does decomposition need heat?

A decomposition reaction needs the addition of a catalyst or heat to proceed. For instance hydrogen peroxide will break down into water and oxygen gas in the presence of a catalyst; and calcium carbonate will break down into calcium oxide and carbon dioxide gas when heated.


What gas will evolve when calcium carbonate was added to acetic acid?

CaCO3 + 2 CH3COOH = Ca(CH3COO)2 + CO2 + H2O the gas evolved is carbon dioxide the other products are calcium acetate and water


When heating marble what reaction occurs?

The gas is Carbon dioxide, formed by the decomposition of Calcium carbonate it the Marble or Limestone


Which gas is produced when a carbonate undergoes thermal decomposition?

Carbon Dioxide


Which gas evolved on heating sodium carbonate?

carbondioxide


What gas does hydrochloric acid produce when mixed with calcium carbonate?

The gas released in the reaction of calcium carbonate with hydrochloric acid is carbon dioxide. CaCO3 + 2 HCl = CaCl2 + CO2 + H2O


What happen when carbon dioxide gas is passed though lime water which compound is formed?

Calcium bicarbonate and calcium carbonate.


Is calcium carbonate a gas?

No. It is a white solid substance.


What is the gas formed when calcium carbonate decomposes?

CO2


How does calcium carbonate influence weld quality?

Calcium carbonate is decomposed and the products CO/CO2 form a gas shielding for the weld.