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Topic: mixture of ethanol and isopropanol  (Read 10423 times)

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Offline unoho

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mixture of ethanol and isopropanol
« on: December 08, 2009, 01:05:17 AM »
hi people,
im a student of grade 12. for my project, i am supposed to find the product when you mix ethanol and isopropanol.

The problem is that I can only find 1 product. but according to my teacher, i am supposed to find 5 different product.
the product i have so far is ethoxyisopropane which is an ethers, of course

can someone please help me derive four more?
thank you

P.S, i have checked various sources but couldn't find any information on it.

Offline sjb

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Re: mixture of ethanol and isopropanol
« Reply #1 on: December 08, 2009, 01:59:10 AM »
How do you rationalise getting ethyl isopropyl ether?

Offline savy2020

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Re: mixture of ethanol and isopropanol
« Reply #2 on: December 08, 2009, 07:32:45 AM »
I don't know how you get ethyl isopropyl ether by just mixing ethanol and isopropanol
It may be that you should heat the mixture with $$ H_2SO_4 /$$.
Then you get ethyl isopropyl ether
Also you get Ethene, Propene, diethyl ether and diisopropyl ether.

:-) SKS

Offline unoho

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Re: mixture of ethanol and isopropanol
« Reply #3 on: December 08, 2009, 05:51:16 PM »
thanks both of you guys for replying me back.

basically.. in my textbook (gr. 12 chemistry) it says..ethers are formed from mixing two alcohol (in this case ethanol and isopropanol) of course with H2SO4 with it. and that makes Ehters plus water.

at savy2020, could you please explain how you got Ethene, Propene, diethyl ether and diisopropyl ether?

thanks again for taking your time.

Offline Borek

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Re: mixture of ethanol and isopropanol
« Reply #4 on: December 08, 2009, 06:18:10 PM »
could you please explain how you got Ethene, Propene, diethyl ether and diisopropyl ether?

Oh man, I am not touching organic chemistry questions with a ten feet pole, but even I know the answers :)

First, when you take two molecules of alcohol, what do you remove to produce an ether? What happens when you remove the same thing from a SINGLE molecule of alcohol?

Second, when you mix ethanol and isopropanol with sulfuric acid, ether is produced. What happens if you mix ethanol and ethanol with sulfuric acid?
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Offline unoho

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Re: mixture of ethanol and isopropanol
« Reply #5 on: December 08, 2009, 06:29:14 PM »
@Borek, lol, see, that's where I'm stuck.
i know that it removes the OH group from isopropanol and one H from ethanol. Doesn't that make H2O?

and don't you only get ehters and water when you mix ethanol with ethanol with sulfuric acid??

thanks for replying back :)

Offline Borek

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Re: mixture of ethanol and isopropanol
« Reply #6 on: December 08, 2009, 06:37:04 PM »
H2O! Bingo! Now, what if you take an ethanol molecule and remove a water molecule? Have you ever heard word "dehydration"?

and don't you only get ehters and water when you mix ethanol with ethanol with sulfuric acid?

What ether?
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Offline unoho

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Re: mixture of ethanol and isopropanol
« Reply #7 on: December 08, 2009, 06:51:11 PM »
ethoxyisopropane is the ethers.

and i thought the making of ethers was a dehydration process.

Quote
Now, what if you take an ethanol molecule and remove a water molecule?

so basically if i take ethanol and dehydrate it, that becomes ethene plus water?

Offline Borek

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Re: mixture of ethanol and isopropanol
« Reply #8 on: December 08, 2009, 07:08:34 PM »
Ethene plus water is OK.

Ethoxyisopropane is wrong - there was no isopropanol, you have mixed ethanol with ethanol...

This must be a mental block. You have black and white marbles in the pocket. You draw two at random. Do they have to be different in color?

1:10 am here, good night.
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Offline unoho

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Re: mixture of ethanol and isopropanol
« Reply #9 on: December 08, 2009, 07:31:15 PM »
Thanks a lot for your help. So just to check if everything is correct....

Mixture of ethanol and isopropanol in the presence of H2SO4 will produce
1) ethoxyisopropane (some ethanol molecules reacts with isopropanol molecules)
2) diethyl ethers (some ethanol molecule reacts with some of the other ethanol molecules)
3) diisopropyl ethers (some of the isopropanol molecule reacts with some of the other isopropanol molecules)
4) ethene (since the whole process undergoes dehydration, some of the ethanol molecule will undergo dehydration, causing it to make ethene)
5) propene (since the whole process undergoes dehydration, some of the ethanol molecule will undergo dehydration, causing it to make propene)

does that seem right??
basically that is my presentation i am supposed to explain it to the rest of the class.
again, thanks everyone for their help.

Offline savy2020

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Re: mixture of ethanol and isopropanol
« Reply #10 on: December 09, 2009, 01:47:51 AM »
5) propene (since the whole process undergoes dehydration, some of the ethanol molecule will undergo dehydration, causing it to make propene)
That should be isopropanol.

By the way just for your information-
In these dehydration reactions,
Alkenes will be major products @ about 140 degree celsius
while ethers will be major product @ about 170 degree celsius
:-) SKS

Offline unoho

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Re: mixture of ethanol and isopropanol
« Reply #11 on: December 09, 2009, 05:02:54 PM »
Quote
That should be isopropanol.

@savy2020, ya that's what i meant but wrote ethanol. lol
and thank you for adding that extra bit about temperature.

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