Porcelain turns black when heated due to carbon impurities in the material being burned off, leaving behind a black residue. This happens at high temperatures where the carbon particles react and create black pigments on the surface of the porcelain.
Sulfur is a yellow solid that, when heated in the absence of air, sublimes into a black solid as it undergoes a phase change from solid to gas.
i dont fully understand the question, do you mean the black almost burnt looking substance? which would be soot made from carbon which is the same thing in chimneys
The substance likely underwent a process called carbonization, where heat causes it to break down and leave behind a residue that appears black due to the presence of carbon. This black deposit is commonly seen when organic materials like wood or sugar are heated in the absence of sufficient oxygen for full combustion.
The black soot deposited on a porcelain dish consists of carbon particles that are left behind when organic matter, like food, is burnt or charred. It is a result of incomplete combustion of the material.
Porcelain turns black when heated due to carbon impurities in the material being burned off, leaving behind a black residue. This happens at high temperatures where the carbon particles react and create black pigments on the surface of the porcelain.
Porcelain will turn black when heated over a Bunsen burner due to carbon deposits from incomplete combustion of the gas. The carbon particles are deposited on the surface of the porcelain, causing it to appear black.
Sulfur is a yellow solid that, when heated in the absence of air, sublimes into a black solid as it undergoes a phase change from solid to gas.
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The black solid that collects on the outside of an evaporating basin when heated by a yellow Bunsen flame is likely soot. Soot is a carbonaceous substance formed from incomplete combustion of carbon-containing materials.
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i dont fully understand the question, do you mean the black almost burnt looking substance? which would be soot made from carbon which is the same thing in chimneys
The black substance created by a yellow Bunsen burner flame is typically soot, which is carbon particles that have not fully combusted in the flame. The yellow color of the flame indicates incomplete combustion, leading to the production of soot as a byproduct.
The yellow sooty flame is a sign of incomplete combustion in the bunsen burner, which produces carbon particles (soot) along with carbon monoxide. When a porcelain dish is placed in the flame, these carbon particles can deposit on its surface, leaving a black residue. This residue is mainly composed of carbon.
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The black substance is likely to be the residue of the substance that was heated in the evaporating dish. This residue is left behind after the solvent or liquid has evaporated, and can be carbon or other impurities from the original substance. It is important to clean the evaporating dish thoroughly to remove the residue before its next use.