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Okay, let's define our terms here. By "salt" I assume you mean table salt, sodium chloride.
It doesn't really exist as "molecules" since it's ionic.
Complicating things even further, "starch" is a polymer/oligomer, and the size of its molecules varies considerably.
However, one formula unit of sodium chloride is much much smaller than even a small molecule of starch.
What else can I help you with?
Why does a iodine solution change color with starch?
When iodine is added to a solution containing starch, it forms a starch-iodine complex in which the iodine molecules are trapped within the helical structure of the starch. This complex absorbs light differently than free iodine, resulting in a color change from yellow-brown (free iodine) to blue-black (starch-iodine complex).
Why starch is added in iodometric titration?
Starch is added in iodometric titration as an indicator to detect the endpoint of the titration. In the presence of iodine, starch forms a blue complex that is easily visible. The appearance of this blue color signifies that all the iodine has reacted with the analyte, helping the person conducting the titration to know when the reaction is complete.
When a mixture of starch and glucose is put into a bag made from partially permeable membrane and is put in a beaker so after 20 minutes what change will take place in the contents of bag?
After 20 minutes, the glucose molecules will diffuse out of the bag through the partially permeable membrane because they are smaller in size than the starch molecules. The starch molecules, being too large to pass through the membrane, will remain inside the bag.
Why iodine not soluble in water?
Iodine is not soluble in water because the intermolecular forces between iodine molecules (Van der Waals forces) are stronger than the forces between iodine and water molecules. This makes it difficult for iodine to break its solid lattice structure and separate into individual ions or molecules that can interact with water.
Why you use starch as indicator in iodometric titration?
Because starch forms a dark blue colored soluble product with free iodine, so that the appearance of color in the solution from this reaction effectively shows when all the substances in the solution that react more strongly with iodine than does starch have been consumed and the titration is finished.
How might the size of the membrane pore compare to the size of the starch molecules?
In other words this question asks if the pores are bigger or smaller than the iodine molecules. So.... the answer is that the iodine are smaller than the pores and the pores are bigger, because the iodine molecules need room to pass through, and the pores are not selectively permeable because they let the iodine through.
Why does a iodine solution change color with starch?
When iodine is added to a solution containing starch, it forms a starch-iodine complex in which the iodine molecules are trapped within the helical structure of the starch. This complex absorbs light differently than free iodine, resulting in a color change from yellow-brown (free iodine) to blue-black (starch-iodine complex).
Rank the following by relative size glucose moleculeswater moleculesiodine molecules starch molecules and membrane pores?
1) water 2) IKI 3) Glucose 4) Membrane pores 5) starch obviously starch is larger than the pores b/c it is the only substance that didn't pass through the membrane. glucose is the most complex molecule out of the remaining three, (making it 3rd smallest) and IKI is even less complex, and water is the most simple.
What type of transport occurs when mixing starch and iodine?
When starch and iodine are mixed, a chemical reaction occurs rather than a transport process. The iodine molecules penetrate the starch, forming a blue-black complex that indicates the presence of starch. This interaction is not an example of transport like diffusion or osmosis, but rather a change in the physical state of the mixture due to the binding of iodine to starch.
Are water molecules larger than iodine molecules?
No. Iodine molecules are much larger in a molecular scale. This is due to the number of shells (6 shells) that iodine possess, making it an extremely large element, and its existence as I2 in nature makes it even larger. Water is made up of 2 hydrogen atoms and 1 oxygen atom, making it relatively smaller in comparison.
Does an atom of fluorine have larger or smaller radius than an atom of iodine?
Smaller
What color forms when amylase reacts with starch?
When amylase reacts with starch, it breaks down starch into smaller sugar molecules, primarily maltose. The presence of maltose can be detected using iodine solution, which produces a blue-black color when it interacts with intact starch. However, as amylase continues to break down the starch, the blue-black color fades, indicating the presence of simpler sugars rather than starch. Thus, the color change reflects the enzymatic activity of amylase on starch.
What color is starch with iodine solution?
it is a yellowish/orange colour but when iodine is present, than it will turn an dark-blue/black colour
Which solution contains larger molecules cornstarch or iodine?
Cornstarch contains larger molecules compared to iodine. Cornstarch is a polysaccharide made up of long chains of glucose units, making its molecular size significantly larger. In contrast, iodine exists as small diatomic molecules (I2), which are much smaller in comparison. Thus, cornstarch has larger molecular structures than iodine.
Add a drop of iodine to both a distilled water test tube and to the test tube containing the starch solution in the test tube What do you observe?
The starch solution will turn black, while the distilled water will remain brown, the same colour as the iodine. This is actually because water, normally used as a control, does not contain any starch and as we know, the iodine test is highly specific for the presence of starch hence no colour change other than iodine dissolving in water to form an iodine solution contrary to starch which we know complexes with iodine, to form starch-iodine complex forming the blue-black colour observed
Would you expect the bolling point of chlorine to be higher or lower than that of iodine explain?
The boiling point of iodine (184.3 0C) is substantially higher than the boiling point of chlorine (-34 0C). Each element occurs at standard temperature and pressure as diatomic molecules; iodine molecules have substantially more mass than chlorine molecules; dispersion forces will be higher beween iodine molecules as they have more electrons than chlorine molecules. Both these factors contribute, mass will alomost certainly be the predominant factor.
Why starch is added in iodometric titration?
Starch is added in iodometric titration as an indicator to detect the endpoint of the titration. In the presence of iodine, starch forms a blue complex that is easily visible. The appearance of this blue color signifies that all the iodine has reacted with the analyte, helping the person conducting the titration to know when the reaction is complete.
