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Part 1 Data Summary (1pt) Battery #1: Anode concentration (M) Battery #1: Cathode concentration (M) Battery #1. Cell voltage (V) Battery #2 Anode concentration (M) Battery #2: Cathode concentration (M) Battery #2 Cell voltage (V) Battery #3 Anode concentration (M) Battery #3: Cathode concentration (M) Battery #3 Cell voltage (V) 0.100 0.100 1.050 0.001 0.100 1.020 0.100 0.001 1.030
Battery #1 Cell voltage measured: (2ptr) Metal strip at the anode (2pts) Metal strip at the cathode Anode solution species concentration Cathode solution species concentration zinc copper 1.050 V 0.100 M 0.100 M Saved
Battery #2 Cell voltage measured: 4 (2pts) Metal strip at the anode: (2pts) Metal strip at the cathode: Anode solution species concentration; Cathode solution species concentration; zinc copper 1.020 V 0,001 M 0.100 M
Battery #3 Cell voltage measured: (2pts) Metal strip at the anode: (2pts) Metal strip at the cathode Anode solution species concentration: Cathode solution species concentration zinc copper 1.030 V 0.100 M 0.001 M
(4pts) 1. For Batteries 1, 2 and 3 write out the electrochemical cell in shorthand (e.g, see Eq. 3) Normal : BIU X, X 1 BES 1800 EDIT Bavad
2. Show the half-reactions involved, their correct direction, the half-cell potentials, the net cell reaction and the standard cell potential (E") for Battery #1 (e.g., see equations 4, 5 and 6) (3pts) Standard cell potential (V) (1pts) Number of moles of electrons transferred (n) (1pts) For full credit, upload all of your work for question 2 here. T Choose... Choose...
3. Using the Nernst equation, calculate the theoretical non-standard cell potential for Battery #1, #2 and #3 as they were constructed. (2pts) Battery #1: Theoretical non-standard cell potential (V) (2pts) Battery #2: Theoretical non-standard cell potential (V) (2pts) Battery #3: Theoretical non-standard cell potential (V)
4. Compare your measured cell potentials to the theoretical ones. Give the % error of the data using the following formula. E Fo % error= x 100 (2pts) Battery #1: % error Battery #2% error Battery #3: % error (2pts) (2pts)
5. For Batteries #2 and #3 one has a Q1 and one has a Q-1. Identify the relative magnitude of Q for battery #2 and battery #3 (1pts) Battery #2: relative magnitude of Q Choose.... Choose.... Q-1 0-1 Battery #3: relative magnitude of Q Choose... (1pts)
(3pts) Compared to the standard potential E", how is the potential E affected by the value of Q. Normal : BIU x₁, x² - EE fx 3P 63 Saved Z
6. Calculate the free energy (AG) in joules available for each of your 3 batteries using the theoretical non-standard Ecell calculated in question 3, (2pts) Battery #1: AG (J) (2pts) Battery #2: AG (J) Battery #3: AG (J) (2pts)