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1. A student constructed a voltaic cell using nickel and lead as electrodes. He also used 0.50 M Ni(NO3)2 as the anolyte and 0.25 M Pb(NO3)2 as the catholyte. Ni2+, (aq) + 2e Ni(s), Eºred = -0.25 V Pb2+ (aq) + 2e Pb(s), Ered. = -0.13 V A. Write the balanced reaction occurring in the voltaic cell. Write your answers in your solution sheet. B. Compute the standard cell potential, Eºcell- C. Calculate the cell potential at 28 °C, Ecell.

1. A student constructed a voltaic cell using nickel and lead as electrodes. He also used 0.50 M Ni(NO3)2 as the anolyte and 0.25 M Pb(NO3)2 as the catholyte. Ni2+, (aq) + 2e Ni(s), Eºred = -0.25 V Pb2+ (aq) + 2e Pb(s), Ered. = -0.13 V A. Write the balanced reaction occurring in the voltaic cell. Write your answers in your solution sheet. B. Compute the standard cell potential, Eºcell- C. Calculate the cell potential at 28 °C, Ecell.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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BALANCING REDOX REACTIONS, VOLTAIC CELL AND ELECTROLYSIS 1. A student constructed a voltaic cell using nickel and lead as electrodes. He also used 0.50 M Ni(NO3)2 as the anolyte and 0.25 M Pb(NO3)2 as the catholyte. Ni2+ (aq) + 2e Ni(s), Eºred = -0.25 V Pb2+ (aq) + 2e → Pb(s), Eºred. = -0.13 V A. Write the balanced reaction occurring in the voltaic cell. Write your answers in your solution sheet. B. Compute the standard cell potential, Eºcell- C. Calculate the cell potential at 28 °C, Ecell- D. If the concentration of Pb(NO3)2 solution used was increased, what will be the effect on the measured potential? (increase, decrease, no effect) 4 2. Ate Shawol and Concertina performed electrolysis to determine the identity of an unknown metal X. They determined that 2 electrons are involved in the reaction per mole of the unknown metal X. After applying 1.295 A of current for 16.00 hours, 21.59 g of the unknown metal was deposited to the electrode. Help Ate Shawol and Concertina determine the identity of the unknown metal X. 3. Complete and balance the chemical reaction using method of half-reactions. Write your answer in your solution sheet. Al(s) + NO2 (aq) = Al(OH)4 (aq) + NH3(aq) (basic solution)
Transcribed Image Text:BALANCING REDOX REACTIONS, VOLTAIC CELL AND ELECTROLYSIS 1. A student constructed a voltaic cell using nickel and lead as electrodes. He also used 0.50 M Ni(NO3)2 as the anolyte and 0.25 M Pb(NO3)2 as the catholyte. Ni2+ (aq) + 2e Ni(s), Eºred = -0.25 V Pb2+ (aq) + 2e → Pb(s), Eºred. = -0.13 V A. Write the balanced reaction occurring in the voltaic cell. Write your answers in your solution sheet. B. Compute the standard cell potential, Eºcell- C. Calculate the cell potential at 28 °C, Ecell- D. If the concentration of Pb(NO3)2 solution used was increased, what will be the effect on the measured potential? (increase, decrease, no effect) 4 2. Ate Shawol and Concertina performed electrolysis to determine the identity of an unknown metal X. They determined that 2 electrons are involved in the reaction per mole of the unknown metal X. After applying 1.295 A of current for 16.00 hours, 21.59 g of the unknown metal was deposited to the electrode. Help Ate Shawol and Concertina determine the identity of the unknown metal X. 3. Complete and balance the chemical reaction using method of half-reactions. Write your answer in your solution sheet. Al(s) + NO2 (aq) = Al(OH)4 (aq) + NH3(aq) (basic solution)
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