Chem Lab

The Estimation of Avagadros Number. Aim: to determine the Avagadros number. Procedure: in orderliness to calculate the fraction of a millimeter per lose, a 10 ml clean graduated cylinder was filled to the blot 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 comment till it was evaporated. A 14 cm clean run ticker glass was filled with distilled water up to the brim. diameter of water scratch was measured in order to rally 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 boldness given concentration of the stearic acid thickness of a monolayer of stearic acid was calculated. Size, volume and volume of a inguen o f hundred hints was calculated.

The procedure was repeated twice to get deuce determine of each unknown, in order to get total nurture of avgadros number. Chemical techniques: in order to get make better no of drops make sure that the dropper is at the alike 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 finish: the average avagadros number was estimated to be 3.865e23.If you want to get a full essay, ord er it on our website: OrderEssay.net

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