April 26, 2024, 06:24:27 AM
Forum Rules: Read This Before Posting


« previous next »
Pages: 1 [2]   Go Down

Topic: calculate H+ of the following mixure.  (Read 12648 times)

0 Members and 1 Guest are viewing this topic.

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27664
  • Mole Snacks: +1801/-410
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: calculate H+ of the following mixure.
« Reply #15 on: September 28, 2012, 06:11:18 PM »
Quote from: shanmac on September 28, 2012, 06:08:07 PM
9.5 x 10^-9 = x2 ÷ (6.25 x 10^-5 -x)

You are on the right track, but as AWK pointed earlier - this should be concentration, not number of moles.
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline shanmac

  • Regular Member
  • ***
  • Posts: 20
  • Mole Snacks: +0/-0
Re: calculate H+ of the following mixure.
« Reply #16 on: September 28, 2012, 06:18:12 PM »
Oh so close!

Have I finally got it now...?

Ka nicotine= 10 -8.02 = 9.5 x 10^-9

9.5 x 10^-9 = x2 ÷ (8.33 x 10^-4- x)
x= 2.8 x 10^-6 = [H+]

(pH = 5.55)

Logged

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27664
  • Mole Snacks: +1801/-410
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: calculate H+ of the following mixure.
« Reply #17 on: September 28, 2012, 06:21:20 PM »
That's what I got as well.
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline shanmac

  • Regular Member
  • ***
  • Posts: 20
  • Mole Snacks: +0/-0
Re: calculate H+ of the following mixure.
« Reply #18 on: September 28, 2012, 06:26:06 PM »
Hooray!
Thanks for your assistance, I cannot tell you how helpful it has been to have someone guide me through the process.
Logged
Pages: 1 [2]   Go Up
« previous next »
Sponsored Links