The lab report will be 4-8 pages, typed, double spaced, in 12 pt Times New Roman font. The sections within the lab report should be as follows (and numbered accordingly):
2.0 Synthesis of a Cobalt Complex
3.0 Percent Halide Analysis of Cobalt Complex
4.0 Preparation and Standardization of a 0.3 M Hydrochloric Acid solution
5.0 Percent Ammonia Analysis of Cobalt Complex
6.0 Preparation and Standardization of a 0.1 M Sodium Thiosulfate solution
7.0 Percent Cobalt Analysis of Cobalt Complex
8.0 Discussion and Conclusions
Class Time & Date
Introduction (5 pts)
Discuss the goal of the semester. What …show more content…
Procedures (Sections 2.0 – 7.0, 15 points)
Give a brief summary of the procedure. This should not exceed more than 1 paragraph and ideally will consist of 2-3 sentences.
Present a balanced chemical equations (or equations) for the procedure.
Provide one example calculation with units for the procedure (for section 2.0, the synthesis procedure, the calculation included will be the percent yield).
Present a data table containing all of the other data related to the procedure that was not found in the example calculation.
Present a statement of final results from the procedure along with its reliability (i.e., average plus percent deviation). Section 2.0 will not have this statement since the only result is the grams of your unknown which is included in the percent yield calculation.
Conclusions (5 pts)
In between the end of the procedures and the beginning of the conclusions, staple in pg. 67 from your lab manual, completely filled out.
Discuss what you think your unknown is and …show more content…
Conclusions should be at least 1 page.
Example of Lab Report
1.0 Introduction. The focus of this laboratory work involved the synthesis and identification of an unknown cobalt containing compound. The compound was analyzed for …. Results indicate that the synthesized compound is (insert molecular formula here).
2.0 Synthesis of a Cobalt Complex. A cobalt(III) amine halide compound was prepared by treating solid CoCO3 with HBr to liberate Co(II) in solution. Ammonia and NH4Br were added, and the Co(II) oxidized to Co(III) with H2O2 yielding a wine colored solution from which 11.3 g of a solid, later identified as [Co(NH3)5Br]Br2, was isolated.
Chemical Reactions CoCO3 (s) + 2 HBr Co+2 (aq) + CO2 (g) + H2O (l) + 2 Br- (aq) Co+2 (aq) + 5 NH3 (l) + Br- (aq) [Co(NH3)5Br]+ (aq) 2[Co(NH3)5Br]+ (aq) + 2 H+ (aq) + H2O2 (l) 2[Co(NH3)5Br]2+ (aq) + 2 H2O (l) [Co(NH3)5Br]2+ (aq) + 2 Br- (aq) [Co(NH3)5Br]Br2