AP_P5_DetKeq_LS3 - Names Phuong-Thao Nguyen Rebecca Ly Helen Park Morgan Powell Muntaqa Zaman Apeksha Sitaula Sharanya Vittal Hannah Jankunis Date Your

# AP_P5_DetKeq_LS3 - Names Phuong-Thao Nguyen Rebecca Ly...

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Names: Phuong-Thao Nguyen Rebecca Ly Helen Park Morgan Powell Muntaqa Zaman Apeksha Sitaula Sharanya Vittal Hannah Jankunis Date: 2/9/17 Your Score: 31.5/35 The Determination of an Equilibrium Constant Pre-Lab Exercise: Beaker number [FeSCN 2+ ] 1 2.0 x 10 -4 M 2 1.6 x 10 -4 M 3 1.2 x 10 -4 M 4 8.0 x 10 -5 M (blank) 0.00 M X L SCN (0.002 M)/0.05 L 0.005 L(0.002 M)/0.05 L = 2.0 x 10 -4 M 0.004 L(0.002 M)/0.05 L = 1.6 x 10 -4 M 0.003 L(0.002 M)/0.05 L = 1.2 x 10 -4 M
0.002 L(0.002 M)/0.05 L = 8.0 x 10 -5 M Data: Part I and II: Beaker Absorbance 1 0.747 2 0.618 3 0.500 4 0.375 Unknown, Part II 0.331 Concentration unknown 0.00018 mol/L Part III: Test tube number Absorbance Net absorbance 1 0.139 0.101
2 0.232 0.194 3 0.274 0.236 4 0.325 0.287 Blank -0.038 Discussion of Theory: The equilibrium constant, K eq , of an experiment is dependent on temperature and can quantitatively characterize the equilibrium state of a reaction. It facilitates the determination of molar concentrations of different species in a solution at the state of equilibrium because the net outcome of changes made to a component of the system equals the original value of the constant.

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• Spring '10
• MaryEngels
• Equilibrium, pH, SCN, Test Tube Number