Exercise 20.79 - Enhanced - with Feedback▼ Part AMISSED THIS? Watch KCV: Cell Potential and Concentration; Read Section 20.6. You can click on the Review link to access the section in your eText.An electrochemical cell is based on the following two half-reactions:Oxidation: Pb(s) → Pb²+ (aq, 0.18 M) + 2e¯,E° = -0.13 VReduction: MnO4¯¯(aq, 1.55 M) + 4H+ (aq, 2.1 M) + 3e →MnO₂ (s) +2H₂O(l), E° = 1.68 VCompute the cell potential at 25 °C.Express the cell potential in volts to three significant figures.Ecell =SubmitProvide FeedbackΕ| ΑΣΦRequest Answer?9 of 15VReview | Constants | Periodic TableNext >

[H+] = 2.1 M = 1.55 M[Pb2+] = 0.18 ME0 for oxidation = -0.13 VE0 for reduction = 1.68 VT = 25o…

MISSED THIS? Watch KCV: Cell Potential and Concentration; Read Section 20.6. You can click on the Review link to access the section in your e Text. An electrochemical cell is based on the following two half-reactions: Part A Compute the cell potential at 25 °C. Express the cell potential in volts to three significant figures. Ecell = Oxidation: Pb(s) → Pb²+ (aq, 0.18 M) + 2e, E° -0.13 V Reduction: MnO4 (aq, 1.55 M) + 4H+ (aq, 2.1 M) + 3e → MnO₂ (s) + 2H₂O(1), E = 1.68 V Submit |Ε| ΑΣΦ Request Answer ? V

MISSED THIS? Watch KCV: Cell Potential and Concentration; Read Section 20.6. You can click on the Review link to access the section in your e Text. An electrochemical cell is based on the following two half-reactions: Part A Compute the cell potential at 25 °C. Express the cell potential in volts to three significant figures. Ecell = Oxidation: Pb(s) → Pb²+ (aq, 0.18 M) + 2e, E° -0.13 V Reduction: MnO4 (aq, 1.55 M) + 4H+ (aq, 2.1 M) + 3e → MnO₂ (s) + 2H₂O(1), E = 1.68 V Submit |Ε| ΑΣΦ Request Answer ? V

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

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

The standard EMF for the cell using the overall cell reaction below is +0.65 V: 2AI (s) + 312 (s) What is AGO for the cell reaction in kJ? Express your answer in decimal notation to one decimal place, without units. 2A1³+ (aq) + 61¯ (aq) →>>
A certain metal M forms a soluble nitrate salt MNO3. Suppose the left half cell of a galvanic cell apparatus is filled with a 175. mM solution of MNO3 and the right half cell with a 3.50 M solution of the same substance. Electrodes made of M are dipped into both solutions and a voltmeter is connected between them. The temperature of the apparatus is held constant at 35.0 °C. Which electrode will be positive? What voltage will the voltmeter show? Assume its positive lead is connected to the positive electrode. 0 Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits. left right ■ □x10 X S
A certain metal M forms a soluble sulfate salt M₂SO4. Suppose the left half cell of a galvanic cell apparatus is filled with a 2.00 M solution of M₂SO4 and the right half cell with a 10.0 mM solution of the same substance. Electrodes made M are dipped into both solutions and a voltmeter is connected between them. The temperature of the apparatus is held constant at 35.0 °C. Which electrode will be positive? What voltage will the voltmeter show? Assume its positive lead is connected to the positive electrode. Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits. V left right x10 X T
A certain metal è forms a soluble sulfate salt ₂(so). Suppose the left half cell of a galvanic cell apparatus is filled with a 5.00 M solution of M₂(SO4)3 and the right half cell with a 250. mM solution of the same substance. Electrodes made of M are dipped into both solutions and a voltmeter is connected between them. The temperature of the apparatus is held constant at 35.0 °C. Which electrode will be positive? O left Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits. O right What voltage will the voltmeter show? Assume its positive lead is connected to the positive electrode. 0 x10 X
O ELECTROCHEMISTRY Analyzing a galvanic cell A galvanic cell is powered by the following redox reaction: 3 Br₂(1) + 2 Cr(OH)3(s) + 10OH (aq) - → 6 Br (aq) + 2 CrO (aq) + 8 H₂0(1) Answer the following questions about this cell. If you need any electrochemical data, be sure you get it from the ALEKS Data tab. Write a balanced equation for the half-reaction that takes place at the cathode. Write a balanced equation for the half-reaction that takes place at the anode. Calculate the cell voltage under standard conditions. Round your answer to 2 decimal places. 0 0 E = OV ローロ é X Do ?
Q26 (A). Define an electrolytic cell. Describe with a neat diagram, an electrolytic cell for the decomposition of molten NaCl. Write the reactions at the anode and cathode
Consider a voltaic cell in which the reaction is Zn (s) + 2H+ (aq) → Zn2+ (aq) + H2 (g) It is found that the cell voltage is +0.530 V when [Zn2+] = 1.0 M, PH2 = 1.0 atm. What must be the concentration of H+ in the cell? (Use the following information) (Show your work) 2H+ (aq) + 2e- → H2 (g) Eºred = 0.000 V Zn2+ (aq) + 2e- → Zn(s) Eºred = -0.762 V
Questions 20 and 21 refer to the following information. Galvanic Cell Cell Diagram E°cell (Volts) Mg | Mg2(1.0 M) || Pb*2(1.0 M) | Pb 1 2.24 Zn | Zn(1.0 M) || Pb*2(1.0 M) | Pb 2 0.63 Mg | Mg*(1.0 M) || Zn*2(1.0 M) | Zn 3 The chemical reaction occurring in first galvanic cell is: Mg + Pb*2 → Mg+2 + Pb 21. If the concentration of Mg+2 is changed from 1.0 M to 3.0 M in the galvanic cells above, what will happen to the observed cell voltages in galvanic cells 1 and 3? (A) The voltage in both galvanic cells 1 and 3 will increase. (B) The voltage will decrease in both galvanic cells 1 and 3. (C) The voltage in galvanic cell 1 will increase and will decrease in galvanic cell 3 (D) The voltage in galvanic cell 3 will increase and will decrease in galvanic cell 1. 22. Consider a voltaic cell based on these half-cells. Ag (aq) +e → Ag/s) Cd (aq) + 2e → Cd¢s) E* = +0.80 V E = -0.40 V Identify the anode and give the voltage of this cell under standard conditions. (A) Ag; Ecell = 0.40 V (B) Ag;…
3. The oxidation of methanol, as described by the equation below, has a AG value of -937.9 kJ/mol. What is the standard cell potential for a methanol fuel cell? 2CH3OH +30₂ → 2CO₂ + 4H₂O
A certain metal M forms a soluble sulfate salt M₂SO4. Suppose the left half cell of a galvanic cell apparatus is filled with a 3.00 M solution of M₂SO4 and the right half cell with a 30.0 mM solution of the same substance. Electrodes made of M are dipped into both solutions and a voltmeter is connected between them. The temperature of the apparatus is held constant at 35.0 °C. Which electrode will be positive? What voltage will the voltmeter show? Assume its positive lead is connected to the positive electrode. 0 Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits. left right x10 X Ś
O ELECTROCHEMISTRY = Understanding concentration cells ODDOD 3/5 A certain metal M forms a soluble nitrate salt MNO3. Suppose the left half cell of a galvanic cell apparatus is filled with a 1.50 M solution of MNO3 and the right half cell with a 150. mM solution of the same substance. Electrodes made of M are dipped into both solutions and a voltmeter is connected between them. The temperature of the apparatus is held constant at 30.0 °C. Which electrode will be positive? Oleft right ? What voltage will the voltmeter show? Assume its positive lead is connected to the positive electrode. 0 Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits.
Here is a drawing of an electrochemical cell: the reactions that occur in both halves of the cell are:Sn2 + (aq) + 2e- -> Sn (s) E = -0.14X3 + (aq) + 3e- --> X (s) E =?A. At the close of the circuit, electrons pass and the mass of Sn (s) increases. Mark the anode, cathode, and direction of flow of electrons in the electrical circuit.B. If the standard cell potential is 0.6 volts, what is the redox potential of the half-cell response of X + 3 / X?C. Write the balanced equation for the cell.D. Changed the Sn2 + concentrations from 1 M to 0.5M, and the concentrations of X + 3 from 1M to 0.10M calculated the cell potential in this case.