| Author |
Message |
![[Post New]](/templates/default/images/icon_minipost_new.gif) 2 Feb 2008 23:19:16 IST
|
|
|
My question is why CH3OH is more acidic than HOH?
|
|
|
|
2 Feb 2008 23:23:29 IST
|
|
|
Is it like this, or the other way round ???
|
My birthday is no ordinary day.
Its the day when i declared in my own voice,
I WILL NOT GO QUIETLY INTO THE NIGHT,
I WILL NOT VANISH WITHOUT A FIGHT,
I AM GOING TO LIVE ON,
I AM GOING TO SURVIVE,
I AM GOING TO GET WHATEVER I WANT.
I CELEBRATE MY BIRTHDAY, AS MY INDEPENDENCE DAY !!!!!!!!! |
this reply: 0 points
(with 0 
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
2 Feb 2008 23:26:52 IST
|
|
|
question is correct
|
" The difficult we do immediately, impossible takes a little longer "
--- U.S. Army
"It's better to have a gun and not need it than to need a gun and
not have it."
--- The Sniper
"You can get more with a kind word and a gun than you can with a
kind word. "
--- The Sniper
"Join the Army: travel to exotic distant lands; meet exciting,
unusual people and kill them. "
--- The Sniper
"The victor will never be asked if he told the truth."
--- Adolf Hitler
"Stop talking, start doing"
--- IBM
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
2 Feb 2008 23:28:33 IST
|
|
|
actually karan i also have the same doubt but no one cud give me a solid reason so i learned it,its gud u hav asked
|
" The difficult we do immediately, impossible takes a little longer "
--- U.S. Army
"It's better to have a gun and not need it than to need a gun and
not have it."
--- The Sniper
"You can get more with a kind word and a gun than you can with a
kind word. "
--- The Sniper
"Join the Army: travel to exotic distant lands; meet exciting,
unusual people and kill them. "
--- The Sniper
"The victor will never be asked if he told the truth."
--- Adolf Hitler
"Stop talking, start doing"
--- IBM
|
this reply: 5 points
(with 1
in 1 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
3 Feb 2008 09:10:52 IST
|
|
|
I think you have asked something opposite..
Actually H0H is more acidic than CH3OR. .. and the reason is simple
conjugate base CH3O- is more basic than -OH. (based on electron density)
Hence H2O is more acidic than CH3OH.
|
Sometimes, its better to see behind ourselves to enlighten our forward direction. |
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
3 Feb 2008 09:48:43 IST
|
|
|
in CH 3 --OH the -CH 3 group shows +I effect, i.e, electron releasing character. therefore the electron density on O atom is more.. hence the acidic character is much lessened this is not found in H2O .... hence H2O is more acidic than CH3OH
|
VARSHA KRISHNAN....
------------------------------------
IIT is always a word which rises E thru' d body. But 2 achieve it U hav 2 drain out d entire E out of the body....
|
this reply: 2 points
(with 0
in 1 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
3 Feb 2008 10:04:14 IST
|
|
|
Question is perfectly all right. My teacher also told that only methanol is more acidic than H20. Gotta ask him why though.
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
4 Feb 2008 09:13:28 IST
|
|
|
actually,i think HOH is more acidic than CH3OH simply because ka of HOH IS 10-14 and ka ofCH3OH is around 10-16.
|
people are made for love and machines for use, but unfortunately nowadays machines are being loved and people are used.
check out my new blog on www.sakettheindividualist.blogspot.com
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
4 Feb 2008 17:25:29 IST
|
|
|
+I effect...think so..
|
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
4 Feb 2008 20:55:26 IST
|
|
|
The ques is correct,
When U luk at the Pka values, CH3OH is more acidic than H2O.
Many of U hav given +I effect as the reason but its not true becoz +I effect wud INCREASE BASICITY NOT ACIDITY.
Although alcohols are less acidic than water but this exception can be explained only in one way-
See, in CH3OH, First of all the C-O bond is polar and secondly due to +I effect of CH3, the polarity of the bond increases, and in comparison to this, the OH-H bond is less polar as H has no inductive effect.
So CH3-OH, being polar breaks out easily thus giving H, and hence is more acidic.
See, the acidity diff is very less. The Pka of water=15.7 and that of CH3OH=15.5, so the diff is very less. They are almost equally acidic, but still the explanation can be the one given by me.
Hope U got it.
|
The quality of a person's life is in direct proportion to their commitment to excellence, regardless of their chosen field of endeavor.
It is during our darkest moments that we must focus to see the light.
Check out my blog at:
http://tarinbansal.blogspot.com/
(A must see for every student)
Back to goiit, this time with Baby Veerappan. :D |
this reply: 7 points
(with 1
in 2 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
4 Feb 2008 21:28:01 IST
|
|
|
ok then if we follow this polar bond concept then why do we have H2O more acidic than C2H5OH
|
" The difficult we do immediately, impossible takes a little longer "
--- U.S. Army
"It's better to have a gun and not need it than to need a gun and
not have it."
--- The Sniper
"You can get more with a kind word and a gun than you can with a
kind word. "
--- The Sniper
"Join the Army: travel to exotic distant lands; meet exciting,
unusual people and kill them. "
--- The Sniper
"The victor will never be asked if he told the truth."
--- Adolf Hitler
"Stop talking, start doing"
--- IBM
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
4 Feb 2008 21:44:37 IST
|
|
|
@ sniper/...............
your confusing the whole polar bond theory with this...........
according to chemical polarity .......
ethanol being a polar compound is soluble in water due to the polar nature of water.............
we never conclude on that basis that h2o is more acidic than ethanol
|
" the only thing thats always constant in this world , is change itself.....
so it is better to adapt to the situation or life makes you adapt to it (painfully)..."
- Kundan a.k.a Juan dankh......
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
4 Feb 2008 21:54:05 IST
|
|
|
and for all this mess..........LET ME CLEAR THIS ONCE AND FOR ALL............
I DONT KNOW HOW MANY TIMES I'VE SAID NOT TO GENERALISE THINGS.......
ITS NOT ABOUT ALCOHOLS VS WATER.......FOR ACIDITY......
1.) methanol is a stronger acid than water....
2.) but ethanol is weaker than water..........
|
" the only thing thats always constant in this world , is change itself.....
so it is better to adapt to the situation or life makes you adapt to it (painfully)..."
- Kundan a.k.a Juan dankh......
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
4 Feb 2008 21:55:28 IST
|
|
|
had ho gayi yaar,, i am saying thaat tarin has given polar bond reason for methanol then why cant we use it for ethanol
|
" The difficult we do immediately, impossible takes a little longer "
--- U.S. Army
"It's better to have a gun and not need it than to need a gun and
not have it."
--- The Sniper
"You can get more with a kind word and a gun than you can with a
kind word. "
--- The Sniper
"Join the Army: travel to exotic distant lands; meet exciting,
unusual people and kill them. "
--- The Sniper
"The victor will never be asked if he told the truth."
--- Adolf Hitler
"Stop talking, start doing"
--- IBM
|
this reply: 0 points
(with 0
in 0 votes ) [?]
|
|
You have to be logged on to rate
|
|
|
|
|
Moderation Team
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
