Chemistry: The Molecular Science
5th Edition
ISBN: 9781285199047
Author: John W. Moore, Conrad L. Stanitski
Publisher: Cengage Learning
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Textbook Question
Chapter 20.3, Problem 20.4PSP
Explain how zinc and lead could be separated from each other without plating out copper in the electrolytic cell in Problem-Solving Example 20.4.
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If there is a single aqueous reactant for a voltaic cell,
a concentration cell can be made from it
it won't work without a second reactant
there is no way voltage can be generated
there can't be any free energy
-. In an experiment similar to this one, a polished strip of Cu (s) was found to weigh 16.552
g. This strip was electrolyzed for exactly 26 minutes at an average current of 0.887
amps. The weight of the copper strip after electrolysis was 17.896 g. From these data,
calculate the value of the Faraday constant.
Figure 19.2 shows four different examples of voltammograms. Identify the processes occurring in each system. In each case the vertical axis is the current and the horizontal axis is the (negative) electrode potential.
Chapter 20 Solutions
Chemistry: The Molecular Science
Ch. 20.1 - Use partial atomic orbital box diagrams to explain...Ch. 20.1 - Prob. 20.1ECh. 20.1 - Prob. 20.2ECh. 20.2 - Prob. 20.2PSPCh. 20.2 - Prob. 20.3PSPCh. 20.2 - Prob. 20.3ECh. 20.3 - Explain how zinc and lead could be separated from...Ch. 20.3 - Prob. 20.4ECh. 20.4 - Prob. 20.5ECh. 20.5 - Use data from Appendix J to calculate the enthalpy...
Ch. 20.5 - Use Le Chatelier’s principle to explain how the...Ch. 20.5 - At what pH does Ecell = 0.00 V for the reduction...Ch. 20.6 - Prob. 20.6PSPCh. 20.6 - Prob. 20.8CECh. 20.6 - (a) Name this coordination compound:...Ch. 20.6 - Prob. 20.9CECh. 20.6 - Prob. 20.8PSPCh. 20.6 - Prob. 20.10CECh. 20.6 - Prob. 20.11CECh. 20.6 - Prob. 20.9PSPCh. 20.6 - Prob. 20.12ECh. 20.7 - Prob. 20.10PSPCh. 20.7 - Prob. 20.13CECh. 20.7 - Prob. 20.14CECh. 20 - Prob. 1QRTCh. 20 - Prob. 2QRTCh. 20 - Prob. 3QRTCh. 20 - Prob. 4QRTCh. 20 - Prob. 5QRTCh. 20 - Prob. 6QRTCh. 20 - Prob. 7QRTCh. 20 - Prob. 8QRTCh. 20 - Prob. 9QRTCh. 20 - Prob. 10QRTCh. 20 - Prob. 11QRTCh. 20 - Prob. 12QRTCh. 20 - Prob. 13QRTCh. 20 - Prob. 14QRTCh. 20 - Prob. 15QRTCh. 20 - Which Period 4 transition-metal ions are...Ch. 20 - Prob. 17QRTCh. 20 - Prob. 18QRTCh. 20 - Prob. 19QRTCh. 20 - Prob. 20QRTCh. 20 - Prob. 21QRTCh. 20 - Prob. 22QRTCh. 20 - Prob. 23QRTCh. 20 - Prob. 24QRTCh. 20 - Prob. 25QRTCh. 20 - Prob. 26QRTCh. 20 - Prob. 27QRTCh. 20 - Prob. 28QRTCh. 20 - Prob. 29QRTCh. 20 - Prob. 30QRTCh. 20 - Prob. 31QRTCh. 20 - Prob. 32QRTCh. 20 - Prob. 33QRTCh. 20 - Prob. 34QRTCh. 20 - Prob. 35QRTCh. 20 - Prob. 36QRTCh. 20 - Prob. 37QRTCh. 20 - Prob. 38QRTCh. 20 - Prob. 39QRTCh. 20 - Prob. 40QRTCh. 20 - Prob. 41QRTCh. 20 - Prob. 42QRTCh. 20 - Prob. 43QRTCh. 20 - Prob. 44QRTCh. 20 - Prob. 45QRTCh. 20 - Prob. 46QRTCh. 20 - Prob. 47QRTCh. 20 - Prob. 48QRTCh. 20 - Prob. 49QRTCh. 20 - Prob. 50QRTCh. 20 - Prob. 51QRTCh. 20 - Prob. 52QRTCh. 20 - Give the charge on the central metal ion in each...Ch. 20 - Prob. 54QRTCh. 20 - Prob. 55QRTCh. 20 - Classify each ligand as monodentate, bidentate,...Ch. 20 - Prob. 57QRTCh. 20 - Prob. 58QRTCh. 20 - Prob. 59QRTCh. 20 - Prob. 60QRTCh. 20 - Prob. 61QRTCh. 20 - Prob. 62QRTCh. 20 - Prob. 63QRTCh. 20 - Prob. 64QRTCh. 20 - Prob. 65QRTCh. 20 - Prob. 66QRTCh. 20 - Prob. 67QRTCh. 20 - Prob. 68QRTCh. 20 - Prob. 69QRTCh. 20 - Prob. 70QRTCh. 20 - Prob. 71QRTCh. 20 - Prob. 72QRTCh. 20 - Prob. 73QRTCh. 20 - Prob. 74QRTCh. 20 - How many unpaired electrons are in the high-spin...Ch. 20 - Prob. 76QRTCh. 20 - Prob. 77QRTCh. 20 - Prob. 78QRTCh. 20 - An aqueous solution of [Rh(C2O4)3]3− is yellow....Ch. 20 - Prob. 80QRTCh. 20 - Prob. 81QRTCh. 20 - Prob. 82QRTCh. 20 - Prob. 83QRTCh. 20 - Prob. 84QRTCh. 20 - Give the electron configuration of (a) Ti3+. (b)...Ch. 20 - Prob. 86QRTCh. 20 - Prob. 87QRTCh. 20 - Prob. 88QRTCh. 20 - Prob. 89QRTCh. 20 - Prob. 90QRTCh. 20 - Prob. 91QRTCh. 20 - Prob. 92QRTCh. 20 - Prob. 93QRTCh. 20 - Prob. 94QRTCh. 20 - Prob. 95QRTCh. 20 - Prob. 96QRTCh. 20 - Prob. 97QRTCh. 20 - Prob. 98QRTCh. 20 - Prob. 99QRTCh. 20 - Prob. 100QRTCh. 20 - Prob. 101QRTCh. 20 - Prob. 103QRTCh. 20 - Prob. 104QRTCh. 20 - Prob. 105QRTCh. 20 - Prob. 106QRTCh. 20 -
Repeat the directions for Question 106 using a...Ch. 20 - Prob. 113QRTCh. 20 - Prob. 114QRTCh. 20 - Prob. 115QRTCh. 20 - Prob. 116QRTCh. 20 - Prob. 117QRTCh. 20 - Prob. 118QRTCh. 20 - Prob. 119QRTCh. 20 - Prob. 120QRTCh. 20 - The glycinate ion (gly) is H2NCH2CO2. It can act...Ch. 20 - Five-coordinate coordination complexes are known,...Ch. 20 - Prob. 123QRTCh. 20 - Prob. 124QRTCh. 20 - Two different compounds are known with the formula...Ch. 20 - Prob. 126QRT
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- The following two half-reactions arc involved in a voltaic cell. At standard conditions, what species is produced at each electrode? Ag++eAgE=0.80VNi2++2eNiE=0.25Varrow_forwardA potassium chloride solution is electrolyzed by passing a current through the solution using inert electrodes. A gas evolves at each electrode, and there is a large increase in pH of the solution. Write the half-reactions that occur at the anode and at the cathode.arrow_forwardIf alkaline batteries were not alkaline but rather acidic (as in the older dry cell batteries), what extra difficulties could you envision with corrosion, based on reactions that are part of the table of standard reduction potentials?arrow_forward
- Half-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_forwardGive the balanced cell equation and determine for the galvanic cells based on the following half-reactions. Standard reduction potentials are found in Table 17-1. a. Cr2O72+14H++6e2Cr3++7H2OH2O2+2H++2e2H2O b. 2H++2eH2Al3++3eAlarrow_forwardDraw and label an electrochemical cell made with a copper electrode in a 0.5 M copper sulfate solution, and a silver electrode in a 0.5 M silver nitrate solution. Assume the temperature is 298 K. Label the anode, cathode, salt bridge, any inert electrodes used, direction of electron flow, direction of current flow, etc. and the reaction occurring in each half-cell. ALSO write the standard cell notation. Might want to check out that table in the back to make sure you got right reduction and oxidation going on.arrow_forward
- In an electrochemical experiment the theoretical voltage for the voltaic cells was not always the same as the measured voltage. List and briefly discuss two factors that may explain why the measured voltage was not equal to the theoretical value.arrow_forwardIn a concentration cell, is the more concentrated electrolyte in the cathode or the anode compartment? Explain.arrow_forwardDetermine the oxidation number of the Chromium (Cr) in an unknown salt if electrolysis of a molten sample of this salt for 3 hours witha 15 amp current deposits 43.65 grams of Chromium metal at the cathode. Answerarrow_forward
- A voltaic cell similar to that shown in Figure 20.5 is constructed. One half-cell consists of an aluminum strip placedin a solution of Al1NO323, and the other has a nickel stripplaced in a solution of NiSO4. The overall cell reaction is2 Al1s2 + 3 Ni2+1aq2 ¡ 2 Al3+1aq2 + 3 Ni1s2(a) What is being oxidized, and what is being reduced?(b) Write the half-reactions that occur in the two half-cells.(c) Which electrode is the anode, and which is the cathode?(d) Indicate the signs of the electrodes. (e) Do electronsflow from the aluminum electrode to the nickel electrodeor from the nickel to the aluminum? (f) In which directionsdo the cations and anions migrate through the solution?Assume the Al is not coated with its oxidearrow_forwardCalculate Ecell (volts) for the galvanic cell containing the reaction shown below where the concentration of the ion at the anode is 0.793 M and the concentration of the ion at the cathode is 2.01 M.arrow_forwardWhen coper and aluminum electrodes are connected in a battery made of stadard half cells... Which species is oxidized? Which species is reduced?arrow_forward
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