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Questions and Answers
What is the purpose of evaporating the contents to dryness on a sand bath?
What is the purpose of evaporating the contents to dryness on a sand bath?
Why is it important to heat the crucible containing the residue slowly at first before heating finally at 1000 ℃?
Why is it important to heat the crucible containing the residue slowly at first before heating finally at 1000 ℃?
What is the purpose of fusing the residue with potassium bisulphate after hydrofluoric acid treatment?
What is the purpose of fusing the residue with potassium bisulphate after hydrofluoric acid treatment?
Why is it necessary to cool and dilute the solution to 250 ml in a calibrated flask during the preparation of the Stock solution?
Why is it necessary to cool and dilute the solution to 250 ml in a calibrated flask during the preparation of the Stock solution?
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Why is ascorbic acid added after oxalic acid in the determination process?
Why is ascorbic acid added after oxalic acid in the determination process?
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What is the purpose of adding ammonia until the color changes to red during the photometric method of residual silica determination?
What is the purpose of adding ammonia until the color changes to red during the photometric method of residual silica determination?
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What is the purpose of allowing the solution to stand for half an hour?
What is the purpose of allowing the solution to stand for half an hour?
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In the determination of silica, why is a test blank solution used?
In the determination of silica, why is a test blank solution used?
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What is the purpose of acidifying the solution with a few drops of HCl in the presence of a phenolphthalein indicator?
What is the purpose of acidifying the solution with a few drops of HCl in the presence of a phenolphthalein indicator?
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How is the total amount of silica in the test solution calculated?
How is the total amount of silica in the test solution calculated?
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Why is methyl orange indicator added before performing complexometric EDTA titration for alumina determination?
Why is methyl orange indicator added before performing complexometric EDTA titration for alumina determination?
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What is the function of ammonia (1:3) during alumina determination using complexometric EDTA titration?
What is the function of ammonia (1:3) during alumina determination using complexometric EDTA titration?
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What is the purpose of adding fusion mixture (Na2CO3 and K2CO3) to the silica sample before fusing in a muffle furnace?
What is the purpose of adding fusion mixture (Na2CO3 and K2CO3) to the silica sample before fusing in a muffle furnace?
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Why is it important to heat the crucible in a muffle furnace at approximately 1000℃ after fusing the silica sample?
Why is it important to heat the crucible in a muffle furnace at approximately 1000℃ after fusing the silica sample?
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Why is it necessary to heat the crucible in a water bath until the smell of HCl is no longer detected?
Why is it necessary to heat the crucible in a water bath until the smell of HCl is no longer detected?
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Why is it essential to wash the residue three times with hot HCl and then with hot water?
Why is it essential to wash the residue three times with hot HCl and then with hot water?
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What is the purpose of transferring the paper along with the filtrate to an ignited and tared Pt-crucible?
What is the purpose of transferring the paper along with the filtrate to an ignited and tared Pt-crucible?
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Why is it crucial to heat the Pt-crucible in a muffle furnace at 1175 - 1200℃ after igniting at a low temperature?
Why is it crucial to heat the Pt-crucible in a muffle furnace at 1175 - 1200℃ after igniting at a low temperature?
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