# Viscosity of Sugar: Calculating Avogadro# & Molecule Size

• jencheeg
In summary, the viscosity of a substance is directly related to the number of molecules present, which can be calculated using Avogadro's number. Avogadro's number can also be used to calculate the size of sugar molecules. Viscosity is an important property to measure in sugar solutions as it affects various processes and temperature has a significant impact on it. Understanding the viscosity and molecular size of sugar can provide valuable insights and contribute to various industries and scientific research.
jencheeg
hi, this is the first time i learn about viscosity, but I don't know where to start with this question:
At 18.5°C, the viscosity of 1 wt% aqueous sugar solution is 1.025 times higher than the viscosity of pure water. At the same temperature, the diffusion coefficient of the sugar molecules is 3.82×10-6cm2/sec and the molecular weight is 342.30. Determine the Avogadro number and the size of the sugar molecule.
if you know any good website, please show me :)

Last edited:
Do you have any thoughts or ideas?

Hint: Einstein, 1905

a good hint, thank you very much !

## 1. What is the relationship between viscosity and Avogadro's number?

The viscosity of a substance is directly related to the number of molecules present in a given volume. As Avogadro's number represents the number of particles in one mole of a substance, it can be used to calculate the viscosity of a solution.

## 2. How is Avogadro's number used to calculate the size of sugar molecules?

Avogadro's number can be used to calculate the size of sugar molecules by dividing the volume of the solution by the number of molecules present. This will give the volume occupied by a single molecule of sugar, which can then be used to calculate its size.

## 3. Why is viscosity an important property to measure in sugar solutions?

Viscosity is an important property to measure in sugar solutions because it affects the flow and movement of the solution. This can impact various processes such as mixing, dissolving, and crystallization, which are important in the production of many food and beverage products.

## 4. How does temperature affect the viscosity of sugar solutions?

Temperature has a significant impact on the viscosity of sugar solutions. As temperature increases, the molecules of sugar have more kinetic energy and are able to move more freely, resulting in a decrease in viscosity. Conversely, decreasing temperature leads to an increase in viscosity.

## 5. What is the significance of understanding the viscosity of sugar and its molecular size?

Understanding the viscosity of sugar and its molecular size can provide valuable insights into the properties and behavior of sugar solutions. This information can be used in various industries, such as food and pharmaceuticals, to optimize processes and improve product quality. Additionally, it can also contribute to scientific research and advancements in the field of chemistry.

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