User:Karlena L. Brown/Notebook/PVOH Research/2012/10/26: Difference between revisions
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==Notes== | ==Notes== | ||
* The Al<sub>3</sub>(SO<sub>4</sub>)<sub>3</sub> 10mM solution was very opaque and cloudy with some precipitate slightly falling out of solution. Before using the Al<sub>3</sub>(SO<sub>4</sub>)<sub>3</sub> solution, it had to be swirled to ensure that all precipitate was in solution. | |||
* Also for the FeSO<sub>4</sub> 10mM salt solution, it was prepared in a 50mL volumetric flask instead of a 100mL volumetric flask. | |||
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Revision as of 00:45, 24 November 2012
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OBJECTIVES
Porphyrin Salt Selection and Preparations 2SO42- salts used:Fe2(SO4)3, Al3(SO4)3, FeSO4, & Na2SO4 Preparing 10mM Stock Solutions For Each Salt :
(Ensure that the volumetric calibration line is not surpassed or solution must be remade.) 10mM Salt Solution Calculations
MW Fe2(SO4)3: 278.91 g/mol 10mM Fe2(SO4)3 × (100mL H2O / 1000mL H2O) × (278.91g Fe2(SO4)3 / 1 mol Fe2(SO4)3) = 0.2789g Fe2(SO4)3
MW Al3(SO4)3: 356.37 g/mol 10mM Al3(SO4)3 × (100mL H2O / 1000mL H2O) × (656.37g Al3(SO4)3 / 1 mol Al3(SO4)3) = 0.6564g Al3(SO4)3
MW FeSO4: 278.01 g/mol 10mM FeSO4 × (50mL H2O / 1000mL H2O) × (278.01g FeSO4 / 1 mol FeSO4) = 0.1390g FeSO4
MW Na2SO4: 142.04 g/mol 10mM Na2SO4 × (100mL H2O / 1000mL H2O) × (142.04g Na2SO4 / 1 mol Na2SO4) = 0.1420g Na2SO4
UV-Vis Spectrum of Porphyrin with Salts 2Notes
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