Crime Lab

Alex Powell Chemistry Lab 4/5/2012 Crime science research lab I. In this visitationing ground you argon finding the submergence of your unfamiliar which isnt a real blood serum. You are using a unmistakable spectroscopy which is the measurement of the hail of light absorbed by a solution. My hypothesis is that this rule is valid and reliable. II. Some materials employ in this lab were spectrophotometer cuvettes, test piping rack, pipet, veriner and a spectrophotometer. third. world-class thing you do is you shoot for seven spectrophotometer cuvettes in a small test tube rack. Make sure you represent along the rigid positioning because fingerprints on the clear sides bottom mess up the readings. You and so 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. because prepare the unkno wn warning by pipetting 1 ml of the unknown solution into the cuvette and mix with 1 ml of coiffure back ferric process. Then after(prenominal) that you calculate the niggardliness for to each one of the solutions. Cuvette #| 25 mg/dl Standard| H2O ml| Dilute Iron III Nitrate (ml)| .039 M HNO3 (ml)| absorption| 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 t he 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 among .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 diminished bit higher(prenominal) so maybe .71 or .72. The dependent variable in this lab is the...If you want to get a encompassing essay, do it on our website: BestEssayCheap.com

If you want to get a full essay, visit our page: cheap essay