ma Exam _3 Review Questions

# ma Exam _3 Review Questions - 1 If the standard reduction...

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1. If the standard reduction potential of A is 2.5V and B is -.15V which is oxidized and which is reduced? B is oxidized A is reduced 2. What is the difference between a voltaic cell, electrolytic cell, and a concentration cell? Voltaic- spontaneous reaction, different metals at anode and cathode Electrolytic- non-spontaneous reaction, (voltaic cell with a battery on it that drives it in reverse. Cathode becomes negative, anode becomes positive. Concentration- same metal and anode and cathode with different concentrations, more concentrated side is the cathode, more dilute is the anode 3. What metals would work for cathodic protection of potassium metal? Lithium 4. What is the mass defect of 1 gold atom nucleus? mass of neutron = 1.008664916 amu mass of proton = 1.007276467 amu (79 protons x 1.007276467) + (118 neutrons x 1.008664916) = 198.597317 - 196.96655 = 1.63077 amu x 1g/6.022E23amu x 1kg/1000g = 2.708 E -27kg E=mc^2 E= 2.437 E -10 J 5. How much energy is released in Joules when the constituent parts of 100 gold atom nuclei come together to form the 100 gold atom nuclei?

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