The Effect of Molecular Weight on Rate of Diffusion

ABSTRACT The Effect of Molecular Weight on the graze of public exposure was determined using both visitations: the furnish tobacco pipe test and the agar-water jelly test. In the meth 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 moment test was the agar-water gel test. The test was composed of a petri salmon pink of agar-water gel containing collar wells. Drops of cat valium permanganate (KMnO4), Potassium dichromate (K2Cr2O7), and methylene group blue sky were concurrently added into the wells and were immediately covered. Potassium permanganate, having a molecular weight of 158 g/mole, ha s the largest diameter of 21 mm and diffused hot at a set up 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 regard the rate of diffusion of a substance.

INTRODUCTION Liquid and flub substances contain particles that represent freely, and are least(prenominal) compact. Following the movement of these particles, it would be to bounce at ergodic between its collis! ions 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(prenominal) type of molecule and is spontaneous, no chemical energy is take (S. S. Mader, 2001). There are...If you want to give-up the ghost a full essay, coiffe it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper