Chem Lab

The Estimation of Avagadros Number. Aim: to determine the Avagadros number. Procedure: in methodicalness to calculate the fraction of a millimeter per lose, a 10 ml clean graduated cylinder was filled to the tornado of 1 cm with hexane. Slowly, drop by drop stearic demigod was added to it until the acid was evaporated, no of drops of stearic acid was stir till it was evaporated. A 14 cm clean roue ticker glass was filled with distilled water up to the brim. diam of water scratch was measured in order to meet the surface area of monolayer of stearic acid. Then drop by drop hexane-stearic solution was added to it with a dropper, holding the dropper at the like wobble throughout the experiment, till a monolayer of stearic acid was formed. No of drops was solution was noned till the monolayer was formed. From the premiss given concentration of the stearic acid thickness of a monolayer of stearic acid was calculated. Size, volume and volume of a breakwat er of hundred portions was calculated.

The procedure was repeated twice to get dickens determine of each unknown, in order to get second-rate nurture of avgadros number. Chemical techniques: in order to get refuse no of drops make sure that the dropper is at the said(prenominal) angle throughout the experiment and size of drops of solution should not vary. nett results: the volumes a carbon atom were estimated to be 0.014e-12 and 0.012e-12.cm3/atom The volume of a mole of carbon atoms were calculated to be 3.42cm3/mol. Two set of avagadros number was calculated to 2.44e10 and 2.85e10 atoms/ mol oddment: the average avagadros number was estimated to be 3.865e23.If you want t o get a full essay, order it on our website:! OrderEssay.net

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