Crime Lab

Alex Powell Chemistry Lab 4/5/2012 Crime science science laboratory I. In this straining ground you argon finding the denseness of your inexplicable which isnt a real blood serum. You are using a unmistakable spectroscopy which is the measurement of the core of light absorbed by a solution. My hypothesis is that this method acting is valid and reliable. II. Some materials employ in this lab were spectrophotometer cuvettes, test thermionic valve rack, pipet, veriner and a spectrophotometer. third. world-class thing you do is you spotlight seven spectrophotometer cuvettes in a small test tube rack. Make sure you represent along the rigid placement because fingerprints on the clear sides bottom mess up the readings. You accordingly pipet the amounts of material listed in Table 1 of your lab manual, whence shake the minglees thoroughly. numeral on you spectrophotometer and set the wavelength control 540 nm. Allow the instrument to tippy up for ten minutes. an d so prepare the unknown warning by pipetting 1 ml of the unknown solution into the cuvette and mix with 1 ml of visit back ferric process. Then after(prenominal) that you calculate the submergence for to each one of the solutions. Cuvette #| 25 mg/dl Standard| H2O ml| Dilute Iron III Nitrate (ml)| .039 M HNO3 (ml)| niggardness| 1| 0| 1| 0| 1| 0| 2| 0.1| 0.9| 1| 0| 0.09| 3| 0.3| 0.7| 1| 0| 0.287| 4| 0.5| 0.5| 1| 0| 0.

407| 5| 0.7| 0.3| 1| 0| 0.706| 6| 1| 0| 1| 0| 1.316| When then use the calibration skid to determine the concentration of the unknown and we get .747. IV. As you basin see from our data as the amount of H2O decreases and the ! 25mg/dl tired increases as does our concentration for the salicylic acids. We keep the amount of dilute iron III nitrate the same because its our freelancer inconstant. With the unknowns concentration we know it falls surrounded by .7mbg/dl of standard and only .3 ml of water. My guess is that its just high the .7 because the concentration is just a olive-sized bit higher(prenominal) so maybe .71 or .72. The dependent variable in this lab is the...If you want to get a dependable essay, do it on our website: OrderCustomPaper.com

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