Chem Postlab #3

Chem Postlab #3 - Sample Identity CaCO3 Exp. Data

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Madeline Williams Justin Green October 12, 2006 Chem 101-582 EXP #3: Post-Lab Results M 1 V 1 = M 2 V 2 (Tap H 2 O) M NaCl V NaCl = M AgNO3 → (0.0025)(10) = 0.0125 = 0.01 M AgNO 3 V AgNO3 2.0 Total Vol Reacted → V AgNO3 = 2.15 - .15 = 2.0 Ml M 1 V 1 = M 2 V 2 (Sample H 2 O) → (0.0013)(10.2) = 0.0013 M AgNO 3 10 M AgNO3 V AgNO3 = M Cl- → (0.01 M)(2.0) = 15 M Cl - V Sample 0.0013 Discussion In determining the concentration of AgNO 3, we first wanted to calculate the total volume of the solution needed. We did this because we know the mole to mole ratio of silver to chloride ions, the volume of the primary standard, the volume of the solution of unknown, and the volume of the blank. In determining the concentration of Chloride Ion, the concentration of the Bay water sample could be calculated from the recorded values. Our Data Comments Trial Blank #1 Standard Run #2 S1 T1 T2 T3
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Unformatted text preview: Sample Identity CaCO3 Exp. Data Vi-2.00-2.00-12.20-2.00-1.96-1.71 Vf-1.85 0.15 4.00-1.96-1.71-1.36 Calculation 0.15 2.15 10.2 0.04 0.25 0.35 Class Data 1 2 3 4 5 6 7 Part A Volume Added 0.65 0.74 0.35 0.2 1 0.4 1.7 Part B Vol AGNO3 2.5 mL 0.62 mL 2.20 mL 2.20 mL 2.75 mL 2.18 mL 3.00 mL Conclusion AGNO3 0.04 0.0403 1.1x10-2 0.009 0.112 0.0083 M1V1=M2V2 8 9 10 11 0.15 0.2 0.2 0.4 2.15 mL 2.10 mL 1.40 mL 2.00 mL 0.0116 0.0132 0.018 0.0125 Conclusion In this experiment we wanted to address the health of San Antonio Bay and estuaries. We specifically addressed chloride ion concentration. We tried to develop a working model of the salinity profile of the bay. We also sampled the data our classmates found during their experiment to incorporate a larger range of data....
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This note was uploaded on 04/08/2008 for the course CHEM 101 taught by Professor Williamson during the Spring '08 term at Texas A&M.

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Chem Postlab #3 - Sample Identity CaCO3 Exp. Data

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