home > q&a board > chemistry > topic: ph

Q BgQuestion:

Scholar
Karma Points: 200
Respect (93%):
posted by  andrea103113 on 7/23/2008 10:40:05 PM  |  status: Live  

pH

Course Textbook Chapter Problem
General Chemistry N/A N/A N/A
Question Details:
Determine the pH of a solution that is .10M CH3COOH and 0.35M CH3COONa
Bonus Point Alert! Earn +4 additional karma points for helping this annual member.

AAnswers:

Answer Question
Sage
Karma Points: 4,677
posted by Jesley on 7/23/2008 11:38:56 PM  |  status: Live
Asker's Rating: Somewhat Helpful   
Response Details:
Guru
Karma Points: 2,000
posted by Xylene on 7/24/2008 7:03:12 AM  |  status: Live
Asker's Rating: Lifesaver   
Response Details:
The given combination is an acid buffer
 Therefore pH = Pka + log [salt]/[acid]
   Ka of acetic acid = 1.8 x 10-5
              pKa = -log (1.8 x 10-5)
                      = 5 - log 1.5
 pH  = 5 - log1.5 + log[0.35/0.10]
       = 5 - log 1.5 + log3.5
      = 5 - 0.1760 + 0.5440
      = 5.368
pH of the solution = 5.368
Answer Question
Ask New Question

Join Cramster's Community

Cramster.com brings together students, educators and subject enthusiasts in an online study community. With around-the-clock expert help and a community of over 100,000 knowledgeable members, you can find the help you need, whenever you need it. Join for free today »

Need Help In

Useful Links