How can you tell if a metal carbonate has undergone a thermal decomposition reaction?
Question
How can you tell if a metal carbonate has undergone a thermal decomposition reaction?
Solution
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First, you need to understand what a thermal decomposition reaction is. It is a type of reaction where a substance breaks down into two or more substances when it is heated.
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In the case of a metal carbonate, the general formula for its thermal decomposition is: MCO3 → MO + CO2 where M represents the metal.
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To determine if a metal carbonate has undergone a thermal decomposition reaction, you would need to look for evidence of the products of the reaction.
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One of the products is a metal oxide (MO). This may be visible as a new solid substance that was not present before the reaction.
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The other product is carbon dioxide (CO2). This is a gas, so you would look for evidence of gas being produced. This could be bubbling, effervescence, or the gas could be captured and tested.
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One common test for carbon dioxide is to bubble the gas through limewater. If the limewater turns cloudy, then carbon dioxide is present.
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Therefore, if you see a new solid substance and evidence of carbon dioxide gas, then it is likely that the metal carbonate has undergone a thermal decomposition reaction.
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