Fall 2010 Labs.pdf - I I r VCUU?l f < n ni,L(r r o L'rt:V...

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I ', f+<. I r n ni,,L(r_ VCUU Y " '?l r o L'rt-:V b6,6,,.. !', b{ { f... i/ e CHEMISTRY 3401.15 &95: Quantitative Analysis Lab : W ( 1 2 : 30-4: 30PM ), F all 20 1 0 (08 I 23 lT}t 0-1 2t 1 S I 201 O) -!;^; {,i "' .; -t @ Rooml0B and @ Room2O1 or203 lnstructor: suying wei, Ph.D. Department of chemistry and Biochemistry Office CH121N; Phone: 409- 880 -7976: email: [email protected],lamar,edu Office Hours: M, T, F: 10:00-11:00a.m {Other times by appointment} Date .K | ), , ifu Sept. 1,2010 q? Sept. 8,2010 I cc sept. 15,2010 Sept. 22,2009 lrC Sept.29,2010 /oo Oct. 6, 2010 ril'J oct. 13,2010 -'_\)-tOct. 20,2010 lo od.27,2a10 Nov. 3, 2010 Experiment Safety Use of Balance, Calibration of Glassware, Statistical Treatment of Data Solution Making Exam Sampling Errors in Particulate Materials Potentiometric titrations of a strong acid with a strong base, Grans plot and derivatives using spreadsheets such as Excel, Lotus, Determination of pKa and ldentification of an unknown acid by potentiometric titrations (report and unknown) Dry Lab'-- Determination of Fe by UV-Vis Spectroscopy --separa-tion, idenfification-_-ehd- Quan{iriCation -of alkanes by Gas Chromatogi'aphy for unknown samples Exam Determination of sulfate by Gravimetric procedure ) Presentations Presentations D Nov. 1 0,2010 Nov. 17,2010 Nov.24, 2010 Sp e_eLtfic I a b c o n t e [!_-11ey__q hAngg_ WjLh--$Lo-LAqr o u n c e m e n t. ,/-.;--:-\---'--- Aq!9q-U!l9s:_s_P:911i gqlou-1qe-me-$.ts ngdg.)Late reports will result in zS"l-tosi oip-oints for the first week and 50% on the following week and so on. lf you miss more than 2 labs for aryg reason, you will get "F" in the whole course. ir:
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/qL. C'1n1daor< Calibration of Glassware Obiective: To give a report of the mass of tap water in a graduated cylinder. From that measurement take the correction factor of volumetric calibrations to determine the true value of our volume for comparison against the experimenal vafue. Preparing Solutions (section 2) Obiective: Using calculations to determine the weight of solute in a solution through equations involving density, etc., prepare the three solutions needed for the procedure involving tap water and NaCl. /' Materials: graduated cylinder, tap water, dropppt, electronic balance, dropper, NaCl, filter paper, stirringrod i Lab Procedures (sectionl): Take a graduaterd cylinder and record the mass. Fill the graduated cylinder up with 10 ml of tap water and record the difference of cylinder from the tap water and the graduated cylinder combined. This gives a the 10ml mass. Repeat this process fur2A ml,3Q m|,40 ml, and 5O ml. From the recorded use the correction factor of volumetric calibrations to determine the true value of the volume of Vb water. Now compare the original experimental volume against the found theoretical on a linear graph. Lab Prpcedures (secion2): Prepare a [email protected] of 0./ M NaCl solution by calculating the grams of solute needed per the given solvent Mix and observe results. Then prepare 1tF ml of a 0.5 wt % NaCl solution by calculating the grams of solute needed per the given solvent using the density of the tap water andsalt combined as a factor.

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