December 22, 2024, 06:23:35 PM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Solving Kp: I can't figure this out... Help Please  (Read 4344 times)

0 Members and 1 Guest are viewing this topic.

Offline csprint03

  • Very New Member
  • *
  • Posts: 2
  • Mole Snacks: +0/-0
Solving Kp: I can't figure this out... Help Please
« on: February 27, 2010, 01:01:25 AM »
Cocaine is a weak base with molecular formula C17H21.NO4.
An aqueous solution was found to have a pH of 8.53 and an osmotic pressure of 52.7 torres at 15 degrees Celcius.
Calculate the Kp of this substance.   R- 62.36 L torr/mol.K
CoC(aq) + H20(l) <===> CoCH+(aq) + OH-(aq)
Kb=[CoCH+][OH-]/ [CoC.]

I know you can relate the osmotic pressure to the rate constant and temperature. I can't figure out how the Kb and Molarity would tie in. how about relating the Kc?
« Last Edit: February 27, 2010, 01:14:43 AM by csprint03 »
Logged

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27885
  • Mole Snacks: +1815/-412
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Solving Kp: I can't figure this out... Help Please
« Reply #1 on: February 27, 2010, 04:31:09 AM »
What about relating osmotic pressure to total concentration of all ions & substances present in the solution?
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline csprint03

  • Very New Member
  • *
  • Posts: 2
  • Mole Snacks: +0/-0
Re: Solving Kp: I can't figure this out... Help Please
« Reply #2 on: February 27, 2010, 11:01:24 AM »
Yea, but how eill that help you find the Kp?
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links