Objective Knowledge Check Question 12 A chemist designs a galvanic cell that use
ID: 714089 • Letter: O
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Objective Knowledge Check Question 12 A chemist designs a galvanic cell that uses these two half-reactions: half-reaction standard reduction potential Etd+1359 V Answer the following questions about this cell. Write a balanced equation for the happens at the cathode. write balanced equation for the happens at the anote equation for the overal reactien that powers the cell. Be sure the reaction is spontaneous a written. Do you have enough nformation to calculate the cell veltage under kandard O Yes No If you said it was possible to calculate the cef voltage, do so and enter you anEW here. Be sure your ansmer has the uorrect number ef significant digits. iDont KnowExplanation / Answer
2Cr(OH)3(s) + 10OH-(aq) - - - - > 2CrO42-(aq) + 8H2O(l) + 6e
E°cell = E°red, cathode - E°red, anode
E°cell = +1.359V - (-0.13V)
E°cell = 1.5V
write a balanced half reaction that happens at cathode 3Cl2(g) + 6e - - - - - - > 6Cl-(aq) write a balanced half reaction that happens at anode2Cr(OH)3(s) + 10OH-(aq) - - - - > 2CrO42-(aq) + 8H2O(l) + 6e
write a balanced equation for the overall reaction that powers the cell. Be sure the reaction is spontaneous as written. 2Cr(OH)3(s) + 10OH-(aq) + 3Cl2(g) - - - - - > 2CrO42-(aq) + 8H2O(l) + 6Cl-(aq) Do you have enough information to calculate the cell voltage under standard conditions Yes If you said it was possible to calculate the cell voltage do so and enter your answer here. Be sure your answer has the correct no of signifigant digits.E°cell = E°red, cathode - E°red, anode
E°cell = +1.359V - (-0.13V)
E°cell = 1.5V
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