c. Record the best-fit line equation in your data table and select OK. 9. Save your data to a jump drive. Return to the main screen. Do not re-calibrate. Part II Prepare and Test Equilibrium Systems 9.Prepare five test tubes of solutions according to the chart below. Use a 10 mL pipette to dispense the distilled water. Follow the necessary steps from Part I to test the absorbance values of each mixture. Record the results in your data table – do not press “Keep”. Note:You are using 0.0020 M Fe(NO3)3in this test.Test tubenumber0.0020 M Fe(NO3)3(mL)0.0020 M SCN–(mL)H2O(mL)13.000.007.0023.002.005.0033.003.004.0043.004.003.0053.005.002.008. To get good data for the calculation of Keq, you must determine the net absorbance of the solutions in Test Tubes 2–5. To do this, subtract the absorbance reading for Test Tube 1 from the absorbance readings of Test Tubes 2–5, and record these values as net absorbance in your data table.
Advanced Chemistry with Vernier 10 - 5 The Determination of an Equilibrium Constant DATA TABLE Part I Beaker number Absorbance 1 2 3 4 5 Best-fit line equation for the Part I standard solutions: Part II Test tube number Absorbance Net absorbance 1 2 3 4 5
10 - 6 Advanced Chemistry with Vernier DATA ANALYSIS 1.(Part II) Use the net absorbance values, along with the best fit line equation of the standard solutions in Part I to determine the [FeSCN2+] at equilibrium for each of the mixtures that you prepared in Part II. Complete the table below and give an example of your calculations.Test tube number2345[FeSCN2+]2.(Part II) Calculate the equilibrium concentrations for Fe3+and SCN–for the mixtures in Test Tubes 2-5 in Part II. Complete the table below and give an example of your calculations.Test tube number2345[Fe3+][SCN–]3.Calculate the value of Keqfor the reaction. Explain how you used the data to calculate Keq.
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