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17 Cards in this Set
- Front
- Back
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The gain of electrons by an element is called _______, a. reduction b. oxidation c. disproportionation d. fractionation e. sublimation |
a. reduction |
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The electrode at which oxidation occurs is called the _________. a. oxidizing agent b. cathode c. reducing agent d. anode e. voltaic cell |
d. anode |
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In a voltaic cell, electrons flow from the _______ to the _____. a. salt bridge, anode b. anode, salt bridge c. cathode, anode d. salt bridge, cathode e. anode, cathode |
e. anode, cathode |
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1 V = ________. a. 1 amp * s b. 1 J/s c. 96485 C d. 1 J/C e. 1 C/J |
d. 1 J/C |
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The more ______ the value of E°red, the greater the driving force for the reduction. a. positive b. negative c. exothermic d. endothermic e. extensive |
a. positive |
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The relationship between the change in Gibbs free energy and the emf of an electrochemical cell is given by _______. a. ∆G = -nF/E b. ∆G = -E/nF c. ∆G = -nFE d. ∆G = -nRTF e. ∆G = -nF/ERT |
c. ∆G = -nFE |
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The lead-containing reactant(s) consumed during recharging of a lead-acid battery is/are ______. a. Pb (s) only b. PbO2 (s) only c. PbSO4 (s) only d. both PbO2 (s) and PbSO4 (s) e. both Pb (s) and PbO2 (s) |
c. PbSO4 (s) only
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Galvanized iron is iron coated with _________. a. magnesium b. zinc c. chromium d. phosphate e. iron oxide |
b. zinc |
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Corrosion of iron is retarded by _________. a. the presence of salts b. high pH conditions c. low pH conditions d. both the presence of salts and high pH conditions e. both the presence of salts and low pH conditions |
b. high pH conditions |
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The purpose of the salt bridge in an eletrochemical cell is to _____. a. maintain electrical neutrality in the half-cells via migration of ions b. provide a source of ions to react at the anode and cathode c. provide oxygen to facilitate oxidation at the anode d. provide a means for electrons to travel from the anode to the cathode e. provide a means for electrons to travel from the cathode to the anode |
a. maintain electrical neutrality in the half-cells via migration of ions
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What is the anode in an alkaline battery ______? a. MnO2 b. KOH c. Zn powder d. Mn2O3 e. Pt |
c. Zn powder
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In a lead-acid battery, the electrodes are consumed. In this battery, a. the anode is Pb b. the anode is PbSO4 c. the anode is PbO2 d. the cathode is PbSO4 e. the cathode is Pb |
a. the anode is Pb
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Cathodic protection of a metal pipe against corrosion usually entails a. attaching an active metal to make the pipe the anode in an electrochemical cell b. coating the pipe with another metal whose standard reduction potential is less negative than that of the pipe c. attaching an active metal to make the pipe the cathode in an electrochemical cell d. attaching a dry cell to reduce any metal ions which might be formed e. coating the pipe with a fluoropolymer to act as a source of fluoride ion (since the latter is so hard to oxidize) |
c. attaching an active metal to make the pipe the cathode in an electrochemical cell
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One of the differences between a voltaic cell and an electrochemical cell is that in an electrochemical cell ________. a. an electric current is produced by a chemical reaction b. electrons flow toward the anode c. a non-spontaneous reaction is forced to occur d. O2 gas is produced at the cathode e. oxidation occurs at the cathode |
c. a non-spontaneous reaction is forced to occur
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Which one of the following types of elements is most likely to be a good oxidizing agent?
a. alkali metals b. lanthanides c. alkaline earth metals d. transition elements e. halogens |
e. halogens
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Consider an electrochemical cell based on the reaction: 2H+ (aq) + Sn (s) --> Sn2+ (aq) + H2 (g) Which of the following actions would change the measured cell potential? a. increasing the pH in the cathode compartment b. lowering the pH in the cathode compartment c. increasing the [Sn2+] in the anode compartment d. increasing the pressure of hydrogen gas in the cathode compartment e. any of the above will change the measure cell potential |
e. any of the above will change the measure cell potential
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Consider an electrochemical cell based on the reaction: 2H+ (aq) + Sn (s) --> Sn2+ (aq) + H2 (g) Which of the following actions would not change the measured cell potential? a. lowering the pH in the cathode compartment b. addition of more tin metal to the anode compartment c. increasing the tin (II) ion concentration in the anode compartment d. increasing the pressure of hydrogen gas in the cathode compartment e. any of the above will change the measured cell potential |
b. addition of more tin metal to the anode compartment
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