UESTION 3 onsider the hydrogen-axygen fuel cell where Which of the fellowing statemeets is true? o...
In a hydrogen fuel cell, oxygen and hydrogen are combincd to produce water and a small potential differ- ence. The steps of the chemical reaction are: at-electrode: at + electrode: H2 + 20H-→ 2H2O + 2e-; O2 + H2O + 2e-→ 2OH-, Use the table of chemical values to calculate a) the work that can be produced from this fuel cell, b) the 'waste' heat produced during standard operation, c) the voltage of the cell, and d) the minimum voltage...
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Which of the following statements is true for the voltaic cell using the reaction: Cu(s) + 2Ag+(aq) + 2Ag(s) + Cu2+(aq) Electrons spontaneously flow from the Cu electrode to the Ag electrode. Electrons spontaneously flow from the Ag electrode to the Cu electrode. O Cations migrate from the salt bridge into the Cu electrode compartment. O none of these
Choose the label Which best describes the following! A Solution containing Zn2+ H Electrode at which oxidation of Zn metal occurs The overall, balanced, spontaneous reaction occurring in this (standard) cell is: o Zn2+(aq) + 2Ag(s) → 2Ag+(aq) + Zn(s) O 2Ag+(aq) + Zn(s) → Zn2+(aq) + 2Ag(s) o Zn2+(aq) + Ag(s) → Ag2+(aq) + Zn(s) o Zn2+(aq) + 2Ag+(aq) + 2Ag2+(aq) + Zn(s) True False True False False The salt bridge completes the electrical circuit while separating the anode...
7. You decide to construct a zinc/aluminum galvanic cell in which the electrodes are connected by a wire and the solutions are connected with a salt bridge. One electrode consists of an aluminum bar in a 1.0 M solution of aluminum nitrate. The other electrode consists of zinc bar in a 1.0 M solution of zinc nitrate. Draw the complete electrochemical cell diagram and use it to answer the questions that follow. a. Which electrode is the cathode and which...
6. Consider the following galvanic cell and standard reduction potentials: Ag Pb E° = 0.80 V salt bridge Ag+ (aq) + e → Ag(s) Pb2+(aq) + 2e → Pb(s) E° = -0.13 V 1 M Ag+ 1 M Pb2+ Which one of the following statements is TRUE? a) The cell on the left containing Ag+(aq) is the anode. b) The initial reading on the voltmeter would be 0.67 V. c) Oxidation occurs in the cell on the right containing Pb²+(aq)....
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Chem 103A Electrochemistry 5. A voltaic cell is to be constructed using the Ag/Ag half cell and the Pb/Pb half-cell. Measurement shows that the silver electrode is positive. a) Write balanced half-reactions and the overall spontancous reaction, without using a table of half-cell potentials. b) Diagram the cell, labeling electrodes as anode and cathode, labeling the salt bridge, showing what ions are in solution, and showing the direction of electron flow in...
Need help with number 3 please.
3. A voltaic cell is buiit from the half-cells described below Half-cell 1: Copper electrode it 0.10 M Cu solution Half-cell 2: Platinum electrode in a solution that is 0.050 M Fe and 0,050 M Fe a. Weite the line notation for the cell. b. Draw a diagram of the cell. Label the anode and cathode, Label the direction of electron flow thorough the wire and ion flow through the salt bridge. c. Write...
Which of the following statements is TRUE? Select one: a. Cell potential is the difference in electromagnetic potential between two half cells of an electrochemical cell b. Cell potential is also known as electrovoltaic force c. Cell potential is the difference in electric potential between two electrodes of an electrochemical cell d. A small battery will have a smaller cell potential than a large battery made out of the same materials e. Cell potential increases as a battery is discharged...
a) Which statement is true for an electrolytic cell? O a. It produces electrical current from electricity. O b. It consumes electrical current to drive a spontaneous chemical reaction. O c. It produces electrical current from a spontaneous chemical reaction. Od. It consumes electrical current to drive a nonspontaneous chemical reaction. b) Balance the following redox reaction in acidic solution. What are the coefficients in front of Al(s) and H2O in the balanced reaction? MnO 4 (aq) + Al(s) +...
Parts a-j of this question refer to the following cell at 298 K. Complete the diagram of the following voltaic cell: Zinc and iron electrodes, aqueous zinc nitrate, aqueous iron (III) nitrate, potassium nitrate salt bridge. Fe3+ (aq) + 3e- → Fe (s) E°= -0.040 V Ag+(aq) + e- → Ag(s) E°= 0.795 V a. Identify the electrodes as Anode or Cathode. Write the correct metal for each assuming the reactions are spontaneous b. Show the direction of the electron...