The Effect of Molecular Weight on Rate of Diffusion

ABSTRACT The Effect of Molecular Weight on the score of public exposure was determined using ii visitations: the frosting tube-shaped structure test and the agar-water jelly test. In the furnish tube test, two balls of like of the same size were soaked in two varied ways, hydrochloric acid (HCl) and ammonium hydroxide (NH4OH) and were inserted into the two ends of the tube. The substance with the ignitor molecular angle (NH4OH, MW= 35.05 grams/mole) diffused gradual resulting a validation of white ring around the glass close to the substance with the lighter molecular weight (HCl, MW= 36.458 grams/mole). The support test was the agar-water gel test. The test was composed of a petri deal of agar-water gel containing collar wells. Drops of potassium permanganate (KMnO4), Potassium dichromate (K2Cr2O7), and methylene radical blue sky were concurrently added into the wells and were immediately covered. Potassium permanganate, having a molecular weight of 158 g/mole, has the largest diameter of 21 mm and diffused hot at a put of 0.365 mm/min as compared to potassium dichromate (d= 18mm, r = 0.332 mm/min) and methylene blue (d = 9 mm, r = 0.033 mm/min). Hence, the molecular weight of a substance is inversely proportionate to the rate of scattering. It was also concluded, that the audition was exposed to other factors that collide with the rate of diffusion of a substance.

INTRODUCTION Liquid and gunslinger substances contain particles that instill freely, and are least(prenominal) compact. Following the movement of these par ticles, it would have the appearance _or_ s! emblance to bounce at ergodic between its collisions with other atoms or molecules. This random movement is called diffusion (Patlack, J. and Watters, C. 1999). Diffusion is the tendency of materials to move from area of higher concentration to areas of lower concentration (Postlethwait, 1995). It is a physical process that john be observed with any type of molecule and is spontaneous, no chemical energy is needed (S. S. Mader, 2001). There are...If you want to give-up the ghost a full essay, hostelry it on our website: OrderCustomPaper.com

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