Laboratory Manual Chemistry in Context
8th Edition
ISBN: 9780073518121
Author: American Chemical Society
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 8, Problem 6Q
Consider the galvanic cell pictured. A coating of impure silver metal begins to appear on the surface of the silver electrode as the cell discharges.
- a. Identify the anode and write the oxidation half-reaction.
- b. Identify the cathode and write the reduction half-reaction.
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Chapter 8 Solutions
Laboratory Manual Chemistry in Context
Ch. 8.1 - Prob. 8.3YTCh. 8.1 - Prob. 8.4YTCh. 8.3 - Prob. 8.9CTCh. 8.4 - Prob. 8.10CTCh. 8.4 - Prob. 8.11SCCh. 8.5 - Prob. 8.13SCCh. 8.5 - Prob. 8.14CTCh. 8.6 - Prob. 8.16CTCh. 8.7 - Prob. 8.17CTCh. 8.7 - Prob. 8.18YT
Ch. 8.7 - Prob. 8.21CTCh. 8.8 - Prob. 8.23CTCh. 8 - Prob. 1QCh. 8 - Prob. 2QCh. 8 - Which chemical species gets oxidized and which...Ch. 8 - What is the difference between a galvanic cell and...Ch. 8 - Two common units associated with electricity are...Ch. 8 - Consider the galvanic cell pictured. A coating of...Ch. 8 - Prob. 7QCh. 8 - a. How does the voltage from a tiny AAA alkaline...Ch. 8 - Prob. 9QCh. 8 - The mercury battery has been used extensively in...Ch. 8 - Prob. 12QCh. 8 - During the conversion of O2(g) to H2O(l) in a fuel...Ch. 8 - How does the reaction between hydrogen and oxygen...Ch. 8 - This diagram represents the hydrogen fuel cell...Ch. 8 - What is a PEM fuel cell? How does it differ from...Ch. 8 - In addition to hydrogen, methane also has been...Ch. 8 - Prob. 18QCh. 8 - Potassium and lithium both are reactive Group 1...Ch. 8 - What challenges keep hydrogen fuel cells from...Ch. 8 - Every year, 5.6 1021 kJ of energy comes to Earth...Ch. 8 - Prob. 22QCh. 8 - Prob. 23QCh. 8 - Prob. 24QCh. 8 - Prob. 25QCh. 8 - Consider these three sources of light: a candle, a...Ch. 8 - Prob. 27QCh. 8 - What is the difference between an electrolytic...Ch. 8 - Provide some differences between a leadacid...Ch. 8 - Prob. 30QCh. 8 - The company ZPower is promoting its silverzinc...Ch. 8 - Prob. 32QCh. 8 - Prob. 33QCh. 8 - You never need to plug in Toyotas gasolinebattery...Ch. 8 - Prob. 35QCh. 8 - What is the tragedy of the commons? How does this...Ch. 8 - Hydrogen is considered an environmentally friendly...Ch. 8 - Fuel cells were invented in 1839 but never...Ch. 8 - Hydrogen and methane both can react with oxygen in...Ch. 8 - Engineers have developed a prototype fuel cell...Ch. 8 - How can the principles of green chemistry be...Ch. 8 - Prob. 42QCh. 8 - Prob. 43QCh. 8 - Small quantities of hydrogen gas can be prepared...Ch. 8 - Prob. 45QCh. 8 - Prob. 46QCh. 8 - Prob. 47QCh. 8 - Prob. 48QCh. 8 - Although Alessandro Volta is credited with the...Ch. 8 - Prob. 50QCh. 8 - If all of todays technology presently based on...Ch. 8 - Prob. 52QCh. 8 - Prob. 53QCh. 8 - Prob. 54QCh. 8 - Prob. 55Q
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- A factory wants to produce 1.00 103 kg barium from the electrolysis of molten barium chloride. What current must be applied for 4.00 h to accomplish this?arrow_forwardThe mass of three different metal electrodes, each from a different galvanic cell, were determined before and after the current generated by the oxidation-reduction reaction in each cell was allowed to flow for a few minutes. The first metal electrode, given the label A, was found to have increased in mass; the second metal electrode, given the label B, did not change in mass; and the third metal electrode, given the label C, was found to have lost mass. Make an educated guess as to which electrodes were active and which were inert electrodes, and which were anode(s) and which were the cathode(s).arrow_forwardElectrochemical Cells II Consider this cell running under standard conditions: Ni(s)Ni2(aq)Cu+(aq)Cu(s) a Is this cell a voltaic or an electrolytic cell? How do you know? b Does current flow in this cell spontaneously? c What is the maximum cell potential for this cell? d Say the cell is connected to a voltmeter. Describe what you might see for an initial voltage and what voltage changes, if any, you would observe as time went by. e What is the free energy of this cell when it is first constructed? f Does the free energy of the cell change over time as the cell runs? If so, how does it change?arrow_forward
- For a voltage-sensitive application, you are working on a battery that must have a working voltage of 0.85 V. The half-cells to be used have a standard cell potential of 0.97 V. What must be done to achieve the correct voltage? What information would you need to look up?arrow_forward. In which direction do electrons flow in a galvanic cell, from anode to cathode or vice versa?arrow_forward. Consider the oxidation—reduction reaction Zn(s)+Pb2+(aq)Zn2+(aq)+Pb(s)Sketch a galvanic cell that uses this reaction. Which metal ion is reduced? Which metal is oxidized? What half-reaction takes place at the anode in the cell? What half-reaction takes place at the cathode?arrow_forward
- Determine the overall reaction and its standard cell potential at 25 C for the reaction involving the galvanic cell in which cadmium metal is oxidized to 1 M cadmium(II) ion and a half—cell consisting of an aluminum electrode in 1 M aluminum nitrate solution. 15 the reaction spontaneous at standard conditions?arrow_forwardAs the voltaic cell shown here runs, the blue solution gradually gets lighter in color and the gray solution gets darker. (a) What species is oxidized and what is reduced? (b) Which electrode is the anode and which is the cathode? (C) Which metal electrode gains mass? (d) In which direction do electrons flow through the external circuit?arrow_forwardHalf-cells were made from a nickel rod dipping in a nickel sulfate solution and a silver rod dipping in a silver nitrate solution. The half-reactions in a voltaic cell using these half-cells were Ag+(aq)+eAg(s)Ni(s)Ni2+(aq)+2e Sketch the cell and label the anode and cathode, showing the corresponding electrode reactions. Give the direction of electron flow and the movement of cations.arrow_forward
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