Effect of molecular weight in the rate of diffusion

The gaseous molecules travel quickly and mix with the molecules in the air which makes it possible for people to immediately smell the ammonia as soon as it is opened. Hydrochloric acid, having a molecular weight of Agar-water gel setup One drop of potassium permanganate KMnO4potassium dichromate K2Cr2O7 and methylene blue was simultaneously placed to each of the three wells in the agar-water gel.

However, personal errors may have been occurred during the conduct of the study due to carelessness, poor technique in measurements or wrong measurements of the experimenters. Agar-water gel setup Table 2 shows the diameter of the wells containing potassium permanganate KMnO4potassium dichromate K2Cr2O7 and methylene blue after 25 minutes with a regular interval of five minutes.

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The diameters of each well were measured in millimeters, excluding the stains surrounding it, within 25 minutes. As we can see, on the first five to 15 minutes, KMnO4 had the longest diameter of 10 mm with a net change of from the zero minute.

The mass of molecules is a major factor, because smaller molecules have higher random velocity for a given ambient temperature, and higher random velocities correspond to faster diffusion.

Partial rates of each substance at a specific time were also plotted and analyzed as shown in Fig. Three solutions with three different molecular weights were distributed to the three wells. In conclusion, the molecular weight of a substance is inversely related to its rate of diffusion.

At a certain temperature, the smaller particle diffuses faster than the bigger one.

How Does Molecular Weight Affect the Rate of Diffusion?

A drop of potassium permanganate KMnO4potassium dichromate K2Cr and methylene blue where simultaneously placed in each well. A graph showing the molecular weights of potassium permanganate, potassium dichromate and methylene blue and their corresponding average rate of diffusion.

After five minutes, the diameter of each well was again measured and recorded for five minutes. October 18, Meyertholen, E.

That maybe because of the presence of some factors like the: The tube test was initiated with the preparation of the set-up which was a two-feet glass tube placed horizontally to a pair of stand and locked with a clip.

The Effect of Molecular Weight on the Rate of Diffusion of Substances Essay Sample

Particles do not always have the same size or molecular weight. Hydrochloric acid HCl has a molecular weight of One is through the use of Glass tube set up where diffusion rate was measured through the distance of white ring of smoke from hydrochloric acid HCl and ammonium hydroxide NH4OH.

Consequently, diffusion coefficients in liquids are directly proportional to the temperature of the fluid but do not depend on the molecular weight of the substance diffusing.

How does molecular weight affect the rate of diffusion?

Diffusion Across Membranes. The experiment was conducted at Room C, Institute of Biological Sciences, University of the Philippines-Los Banos College, Laguna, August 4, MATERIALS and METHODS To determine the effect of molecular weight on the rate off diffusion of a liquid an agar-water gel in a petri dish was used as a medium with three wells.

What Could Affect the Rate of Diffusion of a Molecule Through a Membrane?

The Effect of Different Molar Mass on the Diffusion on Substances Lunar-maius A. Gaerlan Group 2 Sec. X – 9l August 15, ABSTRACT The effect of molecular weight on the rate of diffusion was assessed using agar-water gel test.

The effect of molecular weight on the diffusion rate of substances was determined using the glass tube test and the agar-water gel test. In the glass tube test, two cotton plugs were soaked with hydrochloric acid (HCl) and ammonium hydroxide (NH4OH) and were inserted into both ends of the glass tube.5/5(5).

The Effect of Molecular Weights on the Rate of Diffusion Sharmaine S. Bungabong Group 1 Sec. Y-7L August 11, A scientific paper submitted in partial fulfilment of the requirements in General Biology I Laboratory under Prof.

Cristina Dorado, 1st sem., ABSTRACT The effect of molecular. Diffusion occurs whenever random molecular motion causes molecules to move and mix together.

This random motion is powered by the heat energy present in the surrounding environment. The rate of diffusion -- which causes molecules to naturally move from high concentration to low concentration in search of uniform.

Effect of molecular weight in the rate of diffusion
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The Effect of Molecular Weight on the Rate of Diffusion of Substances | Essay Example