a) Solutions of bromine (Br2(aq)) are brown. Explain how this could be used to distinguish between ethane and ethene.
b) Would you expect bromine solutions to react with benzene?
I'd appreciate any help, thank you!
2007-01-29 13:48:32 · 3 answers · asked by Dark42 2 in Science & Mathematics ➔ Chemistry
a. Bromine reacts much more readily with ethene than ethane. This is because halogen addition to alkenes is faster and doesn't require photochemical activation, unlike halogen substitution with alkanes. Thus, if the brown color disappears, you know that the bromine has reacted, and you know that you're dealing with ethene. If the brown color stays, you have ethane.
b. Bromine by itself is not reactive enough to react with benzene. This is due to benzene's aromatic stabilization.
2007-01-29 13:53:47 · answer #1 · answered by rozinante 3 · 1⤊ 0⤋
bromine loves to add across double bonds, so if mixed with ethene the brown color would disappear, if mixed with ethane the color would remain
bromine would react with benzene but only in a FeBr3 solution
2007-01-29 21:54:01 · answer #2 · answered by jav_7792 2 · 0⤊ 0⤋
a. Br2 can react with ethene and will form white precipitate, while in ethane, no precipitate will form.
b. Br2 can react with benzene with additional help from UV light
2007-01-29 21:57:36 · answer #3 · answered by t0bl3rone 2 · 0⤊ 0⤋