April 27, 2024, 12:09:11 AM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Concentration required  (Read 5499 times)

0 Members and 1 Guest are viewing this topic.

Sargex

  • Guest
Concentration required
« on: October 16, 2005, 11:02:01 AM »
What is the concentration of ammonia required to give a solution with ph 11.9? (Kb ammonia = 1.8e-5)
The answer I came up with is 0.008 but I'm really unsure if this is even close. Thoughts anyone?
Logged

Offline Mitch

  • General Chemist
  • Administrator
  • Sr. Member
  • *
  • Posts: 5298
  • Mole Snacks: +376/-3
  • Gender: Male
  • "I bring you peace." -Mr. Burns
    • Chemistry Blog
Re:Concentration required
« Reply #1 on: October 16, 2005, 12:15:40 PM »
An answer without units is always wrong. Unless its a ratio or something.
« Last Edit: October 16, 2005, 12:16:01 PM by Mitch »
Logged
Most Common Suggestions I Make on the Forums.
1. Start by writing a balanced chemical equation.
2. Don't confuse thermodynamic stability with chemical reactivity.
3. Forum Supports LaTex

Sargex

  • Guest
Re:Concentration required
« Reply #2 on: October 16, 2005, 07:18:03 PM »
oh, sorry I meant 0.008M
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:Concentration required
« Reply #3 on: October 16, 2005, 07:42:23 PM »
Quote from: Sargex on October 16, 2005, 07:18:03 PM
0.008M

Way too low.

0.008M ammonia solution has pH = 10.57
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info
Pages: [1]   Go Up
« previous next »
Sponsored Links