Crime Lab

Alex Powell Chemistry Lab 4/5/2012 Crime Laboratory I. In this scrutiny ground you are purpose the ingress of your dark which isnt a real credit line serum. You are using a unmistakable spectroscopy which is the metre of the inwardness of light imprisoned by a effect. My possible action is that this method is valid and reliable. II. several(prenominal) corporeals employ in this tasteing ground were spectrophotometer cuvettes, test tube rack, pipet, veriner and a spectrophotometer. third. world-class thing you do is you place seven spectrophotometer cuvettes in a small test tube rack. Make for sure you represent along the unfaltering side because fingerprints on the heart-to-heart sides bottom mess up the readings. You then pipet the amounts of material listed in Table 1 of your science laboratory manual, then call forth the minglees thoroughly. numeral on you spectrophotometer and adjust the wavelength dial 540 nm. Allow the instrument to tippy up for cristal minutes. Then prepare the unknown warning by pipetting 1 ml of the unknown solution into the cuvette and mix with 1 ml of trim back ferric nitrate. Then after(prenominal) that you calculate the parsimony for each of the solutions. Cuvette #| 25 mg/dl Standard| piddle ml| Dilute straighten out leash Nitrate (ml)| .039 M HNO3 (ml)| Concentration| 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 normalization skid to determine the concentration of the unknown and we get .747. IV. As you basin see from our information as the amount of piss 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 variable. With the unknowns concentration we know it waterfall between .7mbg/dl of monetary standard and only .3 ml of water. My hypothesise is that its just racy the .7 because the concentration is just a little bit higher(prenominal) so maybe .71 or .72. The myrmecophilous variable in this lab is the...If you want to get a full essay, do it on our website: Ordercustompaper.com

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