Calculating the Molecular Weight of Glucose Polymers

In summary, the conversation discusses the molecular weight of a polymer made from 5 glucose monomers and the process of bonding glucose molecules to form a disaccharide. The approximate molecular weight is debated to be either 810 or 828, with the idea that the water molecules need to be subtracted from 900. It is also suggested that the resulting disaccharide may be cellulose, but this is not confirmed.
  • #1
doc.madani
90
0
Glucose (C6H12O6) is a monomer that can form naturally occurring polymers.
What would be the approximate molecular weight of a polymer made from 5 glucose monomers?

a) 810
b) 828
c) 882
d) 900

i said D, but my friend in convincing me its B :S
 
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  • #2
What happens when two glucose molecules bond together to form a disaccharide?
 
  • #3
is it cellulose, in which the water molecules are condensed out. therefore you will need to subtract the molar mass of the water molecules from 900 ? hence the answer is B ??
 
  • #4
Well, I'm not sure that it's necessary cellulose (which to me is a specific condensation, and perhaps more than 5 monomers), but yes, that's the idea.
 
  • #5


The correct answer is D. In order to calculate the molecular weight of a polymer made from 5 glucose monomers, we first need to know the molecular weight of one glucose molecule. The molecular weight of glucose is 180 g/mol (6 carbon atoms x 12 g/mol + 12 hydrogen atoms x 1 g/mol + 6 oxygen atoms x 16 g/mol).

To find the molecular weight of a polymer made from 5 glucose monomers, we need to multiply the molecular weight of one glucose molecule (180 g/mol) by 5. This gives us a total molecular weight of 900 g/mol (180 g/mol x 5).

Therefore, the approximate molecular weight of a polymer made from 5 glucose monomers is 900 g/mol, which is option D. Option B (828 g/mol) is incorrect because it does not take into account the additional mass of the 5th glucose monomer in the polymer.
 

1. What is the purpose of calculating the molecular weight of glucose polymers?

The molecular weight of glucose polymers is an important factor in determining their physical and chemical properties. It can also provide valuable information about the structure and composition of the polymer, which is crucial for various applications in fields such as medicine, food science, and materials science.

2. How is the molecular weight of glucose polymers calculated?

The molecular weight of a glucose polymer can be calculated by summing the individual molecular weights of each monomer unit in the polymer chain. This can be done using a variety of techniques, such as mass spectrometry, gel permeation chromatography, and nuclear magnetic resonance spectroscopy.

3. What factors can affect the accuracy of molecular weight calculations for glucose polymers?

Several factors can affect the accuracy of molecular weight calculations for glucose polymers. These include the presence of impurities or side chains in the polymer, the use of different calculation methods, and variations in experimental conditions.

4. Why is it important to know the molecular weight distribution of glucose polymers?

The molecular weight distribution of a polymer refers to the range of molecular weights present in a sample. This information is important because it can impact the performance and properties of the polymer, such as its solubility, viscosity, and mechanical strength. It can also affect the processing and manufacturing of products that use glucose polymers.

5. Can the molecular weight of glucose polymers be altered or controlled?

Yes, the molecular weight of glucose polymers can be altered or controlled through various methods such as polymerization techniques, purification processes, and the addition of molecular weight modifiers. These methods can be used to tailor the properties of the polymer for specific applications.

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