Question

Part IIl Prepare and Test Equilibrium Systems 13. Prepare four test tubes of solutions, according to the chart below. Repeat Steps 11 and 12 from Part II to test the absorbance values of each mixture. Record the test results in your data table. Record the [FeSCN in the table in Data Analysis section #3. Note: You are using 0.0020 M Fe(NO3)3 in this test Test tube 0.0020 M Fe(NO3)3 0.0020 M SCN- number (mL) 3.00 3.00 3.00 3.00 (mL) 2.00 3.00 4.00 5.00 H20 (mL) 5.00 4.00 3.00 2.00 2 4.

My professor had to cancel lab last week and just sent us the absorbances for the test tubes to do on our own at home but I don't even know how to go about finding any of this information in the table. I know it's it one question per post but I need the formulas to figure these out.

Answer 1

	1	2	3	4
Initial moles of Fe3+	0.006	0.006	0.006	0.006
initial moles of SCN-	0.004	0.006	0.008	0.01
equilibrium [FeSCN2+]	0.178349	0.304286	0.392242	0.49519
moles of FeSCN2+ at equilibrium	0.001783	0.003043	0.003922	0.004952
moles of Fe3+ at equilibrium	0.004217	0.002957	0.002078	0.001048
Equilibrium [Fe3+]	0.421651	0.295714	0.207758	0.10481
Moles of SCN- at equilibrium	0.002217	0.002957	0.004078	0.005048
Equilibrium [SCN-]	0.221651	0.295714	0.407758	0.50481
Keq	1.908299	3.479663	4.630127	9.359292
Average Keq	4.844345
standard deviation	2.779989
relative standard deviation	57.38628