March 28, 2024, 06:12:20 PM
Forum Rules: Read This Before Posting


Topic: how do you create a buffer system?  (Read 10015 times)

0 Members and 1 Guest are viewing this topic.

JennLyn6

  • Guest
how do you create a buffer system?
« on: March 21, 2004, 05:22:45 PM »
how would you go about to create a buffer system?

Edit: edited title for better indexing. Mitch
« Last Edit: April 24, 2004, 07:06:11 PM by Mitch »

Offline Mitch

  • General Chemist
  • Administrator
  • Sr. Member
  • *
  • Posts: 5298
  • Mole Snacks: +376/-3
  • Gender: Male
  • "I bring you peace." -Mr. Burns
    • Chemistry Blog
Re:one more please
« Reply #1 on: March 21, 2004, 07:30:46 PM »
Do you want an equation or just a rough description?
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

Offline Donaldson Tan

  • Editor, New Asia Republic
  • Retired Staff
  • Sr. Member
  • *
  • Posts: 3177
  • Mole Snacks: +261/-13
  • Gender: Male
    • New Asia Republic
Re:one more please
« Reply #2 on: March 21, 2004, 11:31:12 PM »
a buffer can be created by mixing a weak acid with a strong base, or a strong acid with a weak base. The later is not favoured, cuz typically the working range of most pH indicators will not fall into the buffer system's range  ;)
"Say you're in a [chemical] plant and there's a snake on the floor. What are you going to do? Call a consultant? Get a meeting together to talk about which color is the snake? Employees should do one thing: walk over there and you step on the friggin� snake." - Jean-Pierre Garnier, CEO of Glaxosmithkline, June 2006

JennLyn6

  • Guest
Re:one more please
« Reply #3 on: March 22, 2004, 08:14:58 AM »
thank you for your reply, i would like a description please

GCT

  • Guest
Re:one more please
« Reply #4 on: March 22, 2004, 07:55:04 PM »
First you need to know the pH of the system you wish to create.  Find a conjugate base/acid which (dually weak) with a suitable pKa, you should easily be able to find a list of these in a standard chem book.  Use the henderson hasselbach equation (look it up if you do not know what I am talking about) to find the relative concentration of buffer acid and base.  

Sponsored Links