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    Which of the following reagents could be used to detect the presence of ethanol in gasohol - a mixture of alkanes, alkenes and ethanol.
    A) bromine
    B) hydrogen chloride
    C) sodium
    D) universal indicator

    The answer is C) sodium but I'm not really sure why the answer is sodium. I know the answer is between B and C but I'm sure sure why its specifically C. Can someone explain this.
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    (Original post by Idontlikeict)
    Which of the following reagents could be used to detect the presence of ethanol in gasohol - a mixture of alkanes, alkenes and ethanol.
    A) bromine
    B) hydrogen chloride
    C) sodium
    D) universal indicator

    The answer is C) sodium but I'm not really sure why the answer is sodium. I know the answer is between B and C but I'm sure sure why its specifically C. Can someone explain this.
    My chem's a bit worn out but from how I see it:

    B) From the list, this will react with alkenes, so you're still left with having to differentiate between the other two substances so incorrect. (Fyi alkenes + HCl gives u a chloroalkane)

    C) Sodium reacts with alcohol, and not with alkenes and alkanes, to form alkoxides and hydrogen.
 
 
 
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