Does molecular weight affect the rate of diffusion in a gas?
Thus, Molecular weight affects the rate of diffusion the higher the mass the slower the rate of diffusion. Diffusion demonstrates random motion that proceeds from a region of higher concentration to lower concentration. Diffusion it is when molecules try to achieve equilibrium.
Which conditions increase the rate of diffusion through a semipermeable membrane?
which combination of conditions would increase the rate of diffusion through a semipermeable membrane the most? steeper concentration energy and high temperature.
How molecular weight influences the ability of a substance to travel through a viscous medium?
A High molecular weight increases the viscosity of the material – makes it harder to process the material using conventional methods. The longer the chains, the harder it is to get them to flow because they are more tangled.
What factors influence the rate of diffusion across a membrane?
Factors affecting the rate of diffusion across a cell membrane:
- Membrane Thickness: For Nutrients to diffuse into a cell they must traverse the cell membrane.
- Temperature and Pressure:
- Concentration Gradient:
- Surface Area:
How does molecular weight relate to diffusion?
Graham’s law states that the rate of diffusion or of effusion of a gas is inversely proportional to the square root of its molecular weight. In the same conditions of temperature and pressure, the molar mass is proportional to the mass density.
How does molecular weight affect the rate of diffusion?
Mass of the molecules diffusing: Heavier molecules move more slowly; therefore, they diffuse more slowly. The reverse is true for lighter molecules. Lower temperatures decrease the energy of the molecules, thus decreasing the rate of diffusion.
What is the relationship between molecular weight and diffusion quizlet?
the lower the molecular weight, the faster the rate of diffusion. the higher the molecular weight, the slower the rate of diffusion.
What relationship is reflected between the molecular weight of a substance and its diffusion rate?
In similar conditions, the rate of diffusion of gases is inversely proportional to the square root of the molecular masses of the gases.
What is the relationship between molecular weight and molecular size?
Molecular size can be expressed in terms of weight (MW) and volume (V). Both are important metrics of toxicity; in general, as molecular size increases, bioavailability and toxicity decrease [16]. For example, at MW > 1000 Da, bioavailability is negligible.
How does molecular weight affect rate of diffusion?
Molecular weight will affect the rate of diffusion. All other things being constant, lighter weight molecules will move faster or diffuse faster that heavier molecules. This property could be used to separate heavier molecules from lighter weight molecules.
Why is diffusion faster in gases than in liquids?
Diffusion in gases is faster than in liquids. This is because there is almost no force of attraction in gas molecules and this makes gas molecules free to move in every direction. These are the factors that affect rate of Diffusion; Concentration gradient: The greater the concentration difference, the faster the rate of diffusion.
What is the hypothesis of diffusion through agar gel?
Hypothesis of this experiment is that the fluid with higher molecular weight will diffuse at a slower rate and distance. METHODS AND MATERIALS: DIFFUSION OF DYE THROUGH AGAR GEL In order to assimilate diffusion through a permeable membrane potassium permanganate and methylene blue were used in experiment.
How does molecular weight affect the permeability of a cell?
In this study, we conducted tests on canine blood samples to examine the effects of molecular weight has on the permeability across the cell membrane. According to Fick’s Law, the rate of diffusion is relative to the concentration gradient. Therefore, we hypothesized that molecular weight has no effect on the time it takes to reach hemolysis.