2. The effect of concentration Record your observed voltages and write net ionic equations for the...

 

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2. The effect of concentration Record your observed voltages and write net ionic equations for the reactions, first of NH3, and then of NaS with Cu+. Initial voltage 0.927 v Voltage with NH3 added 0.707=0.7094, Voltage with Na2S added. 7.1159 Explain the reasons for the effects on the cell voltage you observed when NH3 and Na2S were added to the Cu2+/Cu half-cell. How would you adjust the concentrations of Cu2+ and Zn2+ in the cell in order to obtain the maximum voltage possible for this cell? 3. Calculating an equilibrium constant from a cell voltage measurement 0.0321V Cu Cu2+ CO2 (1 M) | CuCO3(s) | Cu Give the magnitude of the cell voltage and indicate which electrode is positive for the following cell. Cell voltage Calculate log Ksp (and Ksp) using Equation (8) and your cell voltage data. log Ksp = Ksp = Compare your calculated value with the value for Ksp of CuCO3 given in the Appendix, Table 9. Suggest reasons why the value of Ksp that you calculated might be considerably larger than the equilibrium value given in Table 9. 2. The effect of concentration Record your observed voltages and write net ionic equations for the reactions, first of NH3, and then of NaS with Cu+. Initial voltage 0.927 v Voltage with NH3 added 0.707=0.7094, Voltage with Na2S added. 7.1159 Explain the reasons for the effects on the cell voltage you observed when NH3 and Na2S were added to the Cu2+/Cu half-cell. How would you adjust the concentrations of Cu2+ and Zn2+ in the cell in order to obtain the maximum voltage possible for this cell? 3. Calculating an equilibrium constant from a cell voltage measurement 0.0321V Cu Cu2+ CO2 (1 M) | CuCO3(s) | Cu Give the magnitude of the cell voltage and indicate which electrode is positive for the following cell. Cell voltage Calculate log Ksp (and Ksp) using Equation (8) and your cell voltage data. log Ksp = Ksp = Compare your calculated value with the value for Ksp of CuCO3 given in the Appendix, Table 9. Suggest reasons why the value of Ksp that you calculated might be considerably larger than the equilibrium value given in Table 9.