solutionequilibrium_pdf - elizondo(jie268 Solutions...

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elizondo (jie268) – Solutions – fakhreddine – (51550) 1 This print-out should have 6 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0points Which is the best representation of the sol- vation of a sodium cation in water? hydrogen oxygen Na + ion 1. 2. correct 3. 4. Explanation: Since the water molecule has a partial neg- ative charge on the O atom, it will orient itself to the O atom closest to the positively charged cation. 002 10.0points Octane (C 8 H 18 ) is a major component of gaso- line. Which of the following would you expect to be the LEAST soluble in gasoline? 1. diesel fuel 2. motor oil 3. table sugar 4. table salt correct 5. candle wax
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elizondo (jie268) – Solutions – fakhreddine – (51550) 2 Explanation: Octane is a non-polar compound so it would be less likely to dissolve polar or ionic sub- stances. 003 10.0points Theoretically, it would be harder to dis- solve (NaCl/Al 2 S 3 ) in water because the (higher/lower) the charge density, the lower the solubility.
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