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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.
Wiki User
∙ 10y ago
Wiki User
∙ 16y agoIn this case, it's obvious... the starch is much bigger. It's composed of quite a few elements... while the iodine is composed of two.
Wiki User
∙ 11y agoDuring diffusion starch in unable to pass through the membrane while KI can, thus starch is the larger molecule.
Chloe Walker
No a water molecule is a lot smaller than a sttarch molecule.
Wiki User
∙ 14y agostarch
Wiki User
∙ 13y agoYes they are
Wiki User
∙ 12y agoYes
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Why starch is added in iodometric titration?
The color formed by reaction between starch and iodine is much more intense than the color of iodine itself, so that the end point can be determined more sensitively with than without starch.
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.
Does nitrogen or iodine effuse faster?
Nitrogen will effuse faster, since it has a smaller molar mass than iodine. Hope this helped!
What molecule is larger starch or sugar?
Starch is a storage polysaccharide and is therefore much larger than sugar, which is merely carbohydrate molecules. Starch is composed of long chains of glucose monomers linked to one another through different types of linkages. Starch shows a branched structure composed of two components: amylose and amylopectin, both of which are basically chains of glucose units. They way in which they are linked to one another decides their properties.
When iodine becomes an ion is the ion larger or smaller?
Iodine gains one electron to form iodide ion. The size of iodide ion is larger than the size of iodine atom.
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.
Does an atom of fluorine have larger or smaller radius than an atom of iodine?
Smaller
Why starch is added in iodometric titration?
The color formed by reaction between starch and iodine is much more intense than the color of iodine itself, so that the end point can be determined more sensitively with than without starch.
Is Starch molecules bigger than protein molecules?
A protein molecule is quite a bit larger than a starch molecule.
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.
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
Why is glucose allowed to pass through a semipermeable membrane and not starch?
Whether molecules are able to pass through the membrane depends on the size of the molecules. Smaller ones can, and larger ones cannot. Glucose can pass through a cell membrane because it is a monomer, which is a smaller molecule than the polymer molecules of starch.
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.
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
What is the element size of bromine?
Its atom size is bigger than Chlorine but smaller than Iodine
What are smaller than cells but larger than atoms?
molecules
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.
