Lab Experiment 6

Lab Experiment 6 - 2+ Test tube number Diluted Fe(NO 3 ) 3...

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Tanisha Billups Experiment 6 March 5, 2008 Determining an Equilibrium Constant Purpose: The purpose of this lab is to calculate the equilibrium constant for the formation of Fe (SCN) 2+ using Le Chatelier’s principle. Procedure A: 1. Get 5 test tubes and 5 rubber stoppers 2. Label each test tube with a number (1-5) 3. Use a Mohr pipet to transfer 4.0mL of 0.0025M Fe(NO 3 ) 3 to a 100mL volumetric flask 4. Add distilled water until the bottom of the meniscus is at the 100mL mark 5. Mix thoroughly 6. Rinse the pipet with the solution 7. Prepare the following solutions with known concentrations of Fe(SCN)
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Unformatted text preview: 2+ Test tube number Diluted Fe(NO 3 ) 3 (mL) 1M KSCN (mL) 0.1M HNO 3 (mL) 1 1 5 4 2 2 5 3 3 3 5 2 4 4 5 1 5 5 5 8. Insert the rubber stoppers 9. Mix thoroughly 10. Measure the absorbance of each at 450 nm and record Procedure B: 1. Label 10 test tubes (6-15) 2. Prepare the following solutions Test tube number 0.0025M Fe(NO 3 ) 3 (mL) 0.0025M KSCN (mL) 0.1M HNO 3 (mL) 6 1 1 5 7 1 1.5 4.5 8 1 2 4 9 1 2.5 3.5 10 1 3 3 11 2 1 4 12 2 1.5 3.5 13 2 2 3 14 2 2.5 2.5 15 2 3 2 3. Mix thoroughly 4. Measure the absorbance at 450nm and record...
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This note was uploaded on 05/01/2011 for the course CHEM 112 taught by Professor Hibbard during the Spring '08 term at Spelman.

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Lab Experiment 6 - 2+ Test tube number Diluted Fe(NO 3 ) 3...

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