Experiment 6

Experiment 6 - Data Part 1 Calibration Curve Using Standard...

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Data: Part 1. Calibration Curve Using Standard Solutions Part 2. Solutions to Determine the Equilibrium Constant, K Solutions For The Determination Of The Equilibrium Constant Solution 0.200 M Fe(NO 3 ) 3 0.00200 M KSCN 0.1 M HNO 3 Absorption Measured [Fe(SCN) 2+ ] From Calibration Curve B-1 5.0 mL 1.00 mL 5.00 mL .055 .000051 B-2 5.0 mL 2.00 mL 4.00 mL .180 .000142 B-3 5.0 mL 3.00 mL 3.00 mL .302 .000232 B-4 5.0 mL 4.00 mL 2.00 mL .445 .00336 B-5 5.0 mL 5.00 mL 1.00 mL .537 .00040 B-1. [Fe 3+ ] [SCN - ] [Fe(SCN) 2+ ] Initial Concentration (M) .00091 .000182 0 Change in Concentration (M) -X -X +X Equilibrium Concentration (M) 8.59 * 10 -4 1.31 * 10 -4 .000051 K = 453 pK = -2.66 B-2. [Fe 3+ ] [SCN - ] [Fe(SCN) 2+ ] Initial Concentration (M) .00091 .000364 0 Change in Concentration (M) -X -X +X Equilibrium Concentration (M) 7.68 * 10 -4 2.22 * 10 -4 .000142 Solutions For Calibration Curve Solution 0.200 M Fe(NO 3 ) 3 0.00200 M KSCN 0.1 M HNO 3 [Fe(SCN) 2+ ] Absorption A-1 25.0 mL 0.00 mL 75.0 mL 0 .005 A-2
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This note was uploaded on 04/21/2010 for the course CHEM CHEM 1BL taught by Professor Ngyuen during the Spring '08 term at UCSB.

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Experiment 6 - Data Part 1 Calibration Curve Using Standard...

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