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abcd8989
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Carbon dioxide and sulphur dioxide both can turn limewater milky. Either the presence of carbon dioxide and sulphur dioxide can give a positive test result. Why limewater test can be a dedicated test for carbon dioxide?
abcd8989 said:Why limewater test can be a dedicated test for carbon dioxide?
If excess amount of carbon dioxide is bubbled into limewater, a clear solution can also be formed (calcium hydrogencarbonate formed). So, excess gas also cannot distinguish between sulphur dioxide and carbon dioxide. I wonder why we usually conclude that carbon dioxide is present if a positive result is shown in limewater test, ignore that it is the presence of sulphur dioxide leading to the positive result.alxm said:It isn't. (But if you pass SO2 through it long enough, it will form CaS and become clear again, so in this particular case, it can be a test if you have enough gas.)
abcd8989 said:If excess amount of carbon dioxide is bubbled into limewater, a clear solution can also be formed (calcium hydrogencarbonate formed).
The Limewater Test is a dedicated test used to detect the presence of carbon dioxide (CO2) in a substance. It works by bubbling the substance being tested through limewater (a solution of calcium hydroxide). If CO2 is present, it reacts with the calcium hydroxide to form a white precipitate of calcium carbonate, indicating the presence of CO2.
The Limewater Test is specifically used for detecting CO2 because it is a highly sensitive and accurate test for this gas. CO2 is a major component of the Earth's atmosphere and is also produced through various natural and man-made processes, making it an important gas to monitor in scientific research and environmental studies.
The Limewater solution is prepared by dissolving calcium hydroxide (Ca(OH)2) in water. The resulting solution is then filtered to remove any impurities and is ready to be used for the Limewater Test.
While the Limewater Test is a sensitive and specific test for CO2, it has some limitations. It can only detect the presence of CO2 and cannot differentiate between different gases. It also requires a relatively large amount of CO2 to produce a visible reaction, making it less effective for detecting trace amounts of the gas.
The Limewater Test has various practical applications in different fields of science, such as environmental studies, chemistry, and biology. It is commonly used to monitor CO2 levels in the atmosphere, in industrial processes, and in biological experiments. It can also be used to test for the presence of CO2 in breath, which can indicate certain medical conditions.