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When a mixture of enzymes stops turning drops of iodine solution, it is likely because the enzyme has catalyzed the reaction that converts starch into glucose, which iodine detects by changing from a blue-black color to a brown or yellow color. Once all the starch has been broken down into glucose, there is no longer any substrate for the iodine to react with, so it remains in its original blue-black color.
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Why did the the mixture stop turning the drops of iodine solution blue after 240 s?
The mixture stopped turning the drops of iodine solution blue after 240 seconds due to the completion of the reaction between iodine and the other components in the mixture. Once all the iodine had reacted, there was no more available iodine to cause the blue color change.
Why was the mixture stop turning the drops of iodine solution blue after 240 s?
The reaction between iodine and starch forms a blue-black complex. Once all the starch present in the solution has reacted with the iodine, no more blue color will be observed. This explains why the mixture stopped turning the drops of iodine solution blue after 240 seconds.
Why did the mixture stop turning the drops of iodine solution blue after 240s?
Because it didn't react with the iodine, i don't know
Why did the mixture stop turning the drops of iodine solution blue after 240 seconds?
The reaction between iodine and starch is complete after a certain period of time, typically around 2-4 minutes. Once all the available starch molecules have formed a complex with iodine, there are no more free starch molecules for the iodine to react with, resulting in the iodine solution no longer turning blue.
Why does iodine stop turning starch blue when saliva is present?
Iodine interacts with starch to form a blue-black complex. The amylase enzyme in saliva breaks down starch molecules into smaller sugar molecules, preventing the iodine from forming the blue-black complex. As a result, iodine does not turn blue in the presence of saliva and starch.
Why did the the mixture stop turning the drops of iodine solution blue after 240 s?
The mixture stopped turning the drops of iodine solution blue after 240 seconds due to the completion of the reaction between iodine and the other components in the mixture. Once all the iodine had reacted, there was no more available iodine to cause the blue color change.
Why was the mixture stop turning the drops of iodine solution blue after 240 s?
The reaction between iodine and starch forms a blue-black complex. Once all the starch present in the solution has reacted with the iodine, no more blue color will be observed. This explains why the mixture stopped turning the drops of iodine solution blue after 240 seconds.
Why did the mixture stop turning the drops of iodine solution blue after 240s?
Because it didn't react with the iodine, i don't know
Why did the mixture stop turning the drops of iodine solution blue after 240 s?
Because it didn't react with the iodine, i don't know
Why did the mixture stop turning the drops of iodine solution blue after 240 seconds?
The reaction between iodine and starch is complete after a certain period of time, typically around 2-4 minutes. Once all the available starch molecules have formed a complex with iodine, there are no more free starch molecules for the iodine to react with, resulting in the iodine solution no longer turning blue.
Why does iodine stop turning starch blue when saliva is present?
Iodine interacts with starch to form a blue-black complex. The amylase enzyme in saliva breaks down starch molecules into smaller sugar molecules, preventing the iodine from forming the blue-black complex. As a result, iodine does not turn blue in the presence of saliva and starch.
Is Tincture of iodine a mixture or compound?
Tincture of iodine is a mixture. It is composed of iodine, potassium iodide, and alcohol. These components are not chemically bonded together, so tincture of iodine is classified as a mixture.
How will you separate iodine and salt mixture?
heat the mixture iodine will sublime collect the iodine vapour separately and cool
Is mixture of iodine and water heterogeneous and why?
Yes, a mixture of iodine and water is heterogeneous because the iodine does not dissolve completely in water, resulting in distinct particles of iodine suspended in the water. This makes it easy to visually distinguish between the iodine and water components.
Is the mixture of iodine and ethanol a heterogeneous. or homogeneous mixture?
The mixture of iodine and ethanol is a heterogeneous mixture because the iodine does not dissolve completely in the ethanol, resulting in visible differences between the two substances.
Is iodine crystals an element compound or mixture?
Iodine is a chemical element; not a mixture, not a compound.
How do you get pure dry iodine from a mixture of iodine and sand.?
Well every school kid knows about the 'cold finger' separation technique. Iodine changes from a solid straight to a gas when heated. It sublimes. So heat the sand/iodine mixture in a pyrex tube or flask which has a 'cold finger' inserted. The hot iodine gas will rise, hit the cold finger and form pure solid iodine crystals on the cold finger. Collect from the finger. This really is bog standard school kid chemistry.
