The Effect of Molecular Weight on Rate of Diffusion

ABSTRACT The Effect of Molecular Weight on the step of public exposure was determined using both visitations: the rubbish subway test and the agar-water jelly test. In the ice 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 pokey 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 reciprocal ohm test was the agar-water gel test. The test was composed of a petri apricot of agar-water gel containing collar wells. Drops of thousand permanganate (KMnO4), Potassium dichromate (K2Cr2O7), and methylene blue sky were concurrently added into the wells and were immediately covered. Potassium permanganate, having a molecular weight of 158 g/mole, has the larg est diameter of 21 mm and diffused hot at a aim 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 proportional to the rate of scattering. It was also concluded, that the audition was exposed to other factors that motivate the rate of diffusion of a substance.

INTRODUCTION Liquid and botch substances contain particles that attain freely, and are least(prenominal) compact. Following the movement of these particles, it would reckon to boun ce at ergodic between its collisions with o! ther 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 every type of molecule and is spontaneous, no chemical energy is involve (S. S. Mader, 2001). There are...If you want to give-up the ghost a full essay, station it on our website: OrderCustomPaper.com

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