Chemistry Lab Report
ab reportChemistry 117L Laboratory Report
Name: Aneesa Noorani Lab Day: Tuesday Lab Room: SCL 114
Date of Experiment: January 22, 2013 TA: Mikhail
1. Basic Laboratory Skills
Purpose(s) of the Experiment: The purpose of the first part of today’s experiment is to establish the stoichiometry of the reaction between titrate oxalate (C2O42-) and permanganate (MnO4-). The purpose of the second part of today’s experiment is to learn about the concepts of the rate of chemical reactions and homogenous catalysis.
Broad Overview of the Experimental Method: The purpose of the first part of today’s experiment will be accomplished by performing titrations. A solution with C2O4- of known concentration will be titrated with MnO4-. The second purpose will be accomplished by: timing and observing the reaction that takes place in a tartrate-H2O solution when the solution has Co2+ added as a catalyst.
Results and Calculations
Part 1: Reagents and their concentrations used
[MnO4-] in the standardized solution provided = 0.025 mol L-1
[H2SO4] used = 2 mol L-1
Initial mass of (vial + sodium oxalate) = 7.8680 g
Mass of (vial + Na2C2O4) after initial transferring of some Na2C2O4 to beaker = 6.9537 g
Mass of Na2C2O4 used = 0.9143 g
Volume of standard sodium oxalate solution prepared = 100 mL = 0.100 L
[C2O42-] in the standard solution prepared:
Work: [C2O42-] = Mass of Na2C2O4 used Molar Mass of Na2C2O4 x Volume (in L) of the standard solution = 0.9143 g 133.99882 g mol-1 x 0.100 L = 6.82 x 10-2 mol L-1
Table 1: Titration Data
Titration # | Volume of Standard Na2C2O4 solution used (mL) | Initial Buret Reading (mL) | Final Buret Reading (mL) | Volume of MnO4- solution used (mL) | 1 | 10.00 | 9.70 | 20.60 | 10.90 | 2 | 10.00 | 20.60 | 31.50 | 10.90 | 3 | 10.00 | 31.60 | 42.50 | 10.90 |
Table 2: Mole ratio calculations
Titration # | Moles of Oxalate Pipetted | Moles of Permanganate Used |
Name: Aneesa Noorani Lab Day: Tuesday Lab Room: SCL 114
Date of Experiment: January 22, 2013 TA: Mikhail
1. Basic Laboratory Skills
Purpose(s) of the Experiment: The purpose of the first part of today’s experiment is to establish the stoichiometry of the reaction between titrate oxalate (C2O42-) and permanganate (MnO4-). The purpose of the second part of today’s experiment is to learn about the concepts of the rate of chemical reactions and homogenous catalysis.
Broad Overview of the Experimental Method: The purpose of the first part of today’s experiment will be accomplished by performing titrations. A solution with C2O4- of known concentration will be titrated with MnO4-. The second purpose will be accomplished by: timing and observing the reaction that takes place in a tartrate-H2O solution when the solution has Co2+ added as a catalyst.
Results and Calculations
Part 1: Reagents and their concentrations used
[MnO4-] in the standardized solution provided = 0.025 mol L-1
[H2SO4] used = 2 mol L-1
Initial mass of (vial + sodium oxalate) = 7.8680 g
Mass of (vial + Na2C2O4) after initial transferring of some Na2C2O4 to beaker = 6.9537 g
Mass of Na2C2O4 used = 0.9143 g
Volume of standard sodium oxalate solution prepared = 100 mL = 0.100 L
[C2O42-] in the standard solution prepared:
Work: [C2O42-] = Mass of Na2C2O4 used Molar Mass of Na2C2O4 x Volume (in L) of the standard solution = 0.9143 g 133.99882 g mol-1 x 0.100 L = 6.82 x 10-2 mol L-1
Table 1: Titration Data
Titration # | Volume of Standard Na2C2O4 solution used (mL) | Initial Buret Reading (mL) | Final Buret Reading (mL) | Volume of MnO4- solution used (mL) | 1 | 10.00 | 9.70 | 20.60 | 10.90 | 2 | 10.00 | 20.60 | 31.50 | 10.90 | 3 | 10.00 | 31.60 | 42.50 | 10.90 |
Table 2: Mole ratio calculations
Titration # | Moles of Oxalate Pipetted | Moles of Permanganate Used |