How can carbon dioxide be prepared from an acid? Give one equation also.
Answers
Answer:
Allied solutions
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Chemistry
Chapters in Simplified Middle School Chemistry - Class 8
Exercises in Carbon and its compounds
Question 11
Q11) In the laboratory preparation of carbon dioxide by action of a dilute acid on a metallic carbonate give - (a) A balanced equation for the preparation (b) A reason for (i) use of a washer bottle containing concentrated H_2SO_4H
2
SO
4
in the preparation (ii) Not collecting the prepared gas over water (iii) Not using dilute sulphuric acid as a reactant in the preparation.
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Solution:
(a) CaCO_3+2HCl\ →\ CaCl_2+CO_2+H_2OCaCO
3
+2HCl → CaCl
2
+CO
2
+H
2
O
(b)
(i) Concentrated H_2SO_4H
2
SO
4
absorbs moisture from the gas in the washer bottle.
(ii) The prepared gas is CO2 which does not collect over water because it is soluble in water.
(iii) Dilute sulphuric acid when used as a reactant with calcium carbonate forms a coating of insoluble calcium sulphate and the reaction stops after a while. CaCO_3+H_2SO_4\ →\ CaSO_4+CO_2+H_2OCaCO
3
+H
2
SO
4
→ CaSO
4
+CO
2
+H
2
O
Explanation:
Brainlist=follow
Answer:
Carbon dioxide is produced whenever an acid reacts with a carbonate. This makes carbon dioxide easy to make in the laboratory. Calcium carbonate and hydrochloric acid are usually used because they are cheap and easy to obtain.
calcium carbonate + hydrochloric acid → calcium chloride + water + carbon dioxide
CaCO3(s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + H2O(l)
Carbon dioxide can be collected over water, as shown in the diagram.
Apparatus arranged to measure the volume of gas in a reaction. Reaction mixture is in a flask and gas travels out through a pipe in the top and down into a trough of water. It then bubbles up through a beehive shelf into an upturned glass jar filled with water. The gas collects at the top of the jar, forcing water out into the trough below.
Carbon dioxide is slightly soluble in water and denser than air, so another way to collect it is in a dry, upright gas jar. As the carbon dioxide falls out of the delivery tube and into the gas jar, it pushes the less dense air out of the top of the gas jar.
A reaction mixture jar and a test tube are connected by a tube. The gas from the reaction mixture jar goes up through the tube and down into the test tube.