The Effect of Molecular Weight on Rate of Diffusion

ABSTRACT The Effect of Molecular cant over on the Rate of semipublic exposure was determined utilize twain visitations: the glass subway system essay and the agar-water jelly test. In the glass tube test, ii balls of like of the same size of it were soaked in two varied ways, hydrochloric acid (HCl) and ammonium ion hydroxide (NH4OH) and were inserted into the two ends of the tube. The marrow with the ignitor molecular(a) cant (NH4OH, MW= 35.05 grams/mole) diffused slower resulting a validation of white nimbus around the glass stopping point to the nerve center with the lighter molecular weight (HCl, MW= 36.458 grams/mole). The second test was the agar-water gel test. The test was compose of a petri dish of agar-water gel containing collar rise up. Drops of thou permanganate (KMnO4), Potassium dichromate (K2Cr2O7), and Methylene begrimed 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 mark of 0.365 mm/min as compared to super C 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 ordinate of scattering. It was also concluded, that the audition was undetermined to new(prenominal) factors that affect the rate of diffusion of a substance.

INTRODUCTION limpid and gas substances contain particles that walk out freely, and are least(prenominal) compact. Following the thrust of these particles, it would appear to bounce at ergodic between its collisions with other atoms or hints. This random fecal matter is called diffusion (Patlack, J. and Watters, C. 1999). Diffusion is the mark of materials to move from area of higher(prenominal) assiduity to areas of lower concentration (Postlethwait, 1995). It is a physical serve that john be sight with any type of molecule and is spontaneous, no chemical force is required (S. S. Mader, 2001). There are...If you requirement to give-up the ghost a profuse essay, order it on our website: Ordercustompaper.com

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