General Questions
These questions are not explicitly keyed to chapter topics; many require integration of several concepts.
Fluorinated organic compounds are important commercially; they are used as herbicides, flame retardants, and fire extinguishing agents, among other things. A reaction such as
CH3SO2F + 3 HF → CF3SO2F + 3 H2
is actually carried out electrochemically in liquid HF as the solvent.
(a) Draw the structural formula for CH3SO2F. (S is the “central” atom with the O atoms, F atom, and CH3 group bonded to it.) What is the geometry around the S atom? What are the O___S___O and O___S___F bond angles?
(b) If you electrolyze 150. g CH3SO2F, how many grams of HF are required and how many grams of each product can be isolated?
(c) Is H2 produced at the anode or the cathode of the electrolysis cell?
(d) A typical electrolysis cell operates at 8.0 V and 250 A. How many kilowatt-hours of energy does one such cell consume in 24 h?
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