| View previous topic :: View next topic |
| Author |
Message |
admin
Site Admin
Joined: 08 Dec 2003
Posts: 2176
|
 Posted: Tue Jul 21, 2009 2:16 pm Post subject: Question 31 |
 |
|
| Be the first to start a discussion about this question! |
|
| Back to top |
|
 |
sbains3528
Joined: 16 Aug 2010
Posts: 14
|
| Posted: Thu Aug 26, 2010 1:39 pm Post subject: |
|
|
31) Phenols are soluble in a strongly basic sodium hydroxide solution, and insoluble in dilute sodium bicarbonate. Phenol has a pKa = 10.0. The introduction of an ortho bromine atom into the phenol would have the effect of
1. lowering the pKa and thus decreasing the acidity of the phenol.
2. lowering the pKa and thus increasing the acidity of the phenol.
3. increasing the pKa and thus decreasing the acidity of the phenol.
4. increasing the pKa and thus increasing the acidity of the phenol.
Can someone explain this to me? The answer was B. |
|
| Back to top |
|
|
j5devries4378
Joined: 07 Aug 2010
Posts: 5
|
| Posted: Thu Aug 26, 2010 9:24 pm Post subject: |
|
|
| Yeah I am confused too... I thought adding an electron donating group would activate the ring, and increase acidity. This increased acidity decrease the pKa and increase the Ka. |
|
| Back to top |
|
|
|
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
