Home | Community | Message Board


RVF Garden Supply
Please support our sponsors.

General Interest >> Science and Technology

Welcome to the Shroomery Message Board! You are experiencing a small sample of what the site has to offer. Please login or register to post messages and view our exclusive members-only content. You'll gain access to additional forums, file attachments, board customizations, encrypted private messages, and much more!

Amazon Shop: pH Test Strips

Jump to first unread post. Pages: 1
Invisibleblacksabbathrulz
 User Gallery
Registered: 05/22/02
Posts: 2,511
Please help with buffers
    #2122543 - 11/19/03 01:26 PM (13 years, 9 months ago)

Okay Its been several years since Ive taken gen chem and need to make up buffers for ph3,5,7,9 having a concentration of about 100 millimolar and having similar ionic strengths. THese need to be common lab chemicals as well. IF anyone has any suggestions I would be greatly indebted to them.


--------------------
.


Post Extras: Print Post  Remind Me! Notify Moderator
OfflineSeussA
Error: divide byzero

Folding@home Statistics
Registered: 04/27/01
Posts: 23,480
Loc: Caribbean
Last seen: 7 months, 11 days
Re: Please help with buffers [Re: blacksabbathrulz]
    #2122572 - 11/19/03 01:35 PM (13 years, 9 months ago)

You can buy buffer solutions at any chem supply store.


--------------------
Just another spore in the wind.


Post Extras: Print Post  Remind Me! Notify Moderator
Invisibleblacksabbathrulz
 User Gallery
Registered: 05/22/02
Posts: 2,511
Re: Please help with buffers [Re: Seuss]
    #2122582 - 11/19/03 01:38 PM (13 years, 9 months ago)

I dont have time to buy them, I need to make them on friday for an experiment which does not give me much time.


--------------------
.


Post Extras: Print Post  Remind Me! Notify Moderator
InvisibleTinMan
Stranger

Registered: 10/01/02
Posts: 2,956
Loc: Russia
Re: Please help with buffers [Re: blacksabbathrulz]
    #2124040 - 11/20/03 12:12 AM (13 years, 8 months ago)

A buffer solution can be one of the following:

weak acid / conjugate acid
weak base / conjugate base

You could use acetic acid as a weak base, then use the conjugate base (just acetate), pretty much you could use any weak acid for another buffer, but it has to react reversibly with water and form H3O+ ions.


Post Extras: Print Post  Remind Me! Notify Moderator
Invisibleblacksabbathrulz
 User Gallery
Registered: 05/22/02
Posts: 2,511
Re: Please help with buffers [Re: TinMan]
    #2124568 - 11/20/03 10:02 AM (13 years, 8 months ago)

I figured everything out.
I ended up making the buffers with:
For pH 7
Piperazine-N,N'-bis-(2-ethanesulphonic acid)
(N-(Carbamoylmethyl)-2-aminoethanesulfonic acid
(3-(N-Morpholino)propanesulfonic acid)
Bis-Tris Base
2-[(2-Hydroxy-1,1-bis[hydroxymethyl]ethyl)amino]ethanesulfonic acid

pH 3
Chloroacetic Acid
Formic Acid
Maleic Acid

ph5
Acetic Acid
Propionic Acid
Pyridine
Piperazine

pH 9
Tricine Free Acid
Bicine Free Acid
2-Hydroxy-1,1-bis[bydroxymethyl]ethyl)amino]-1-propanesulfonic acid)
Ethanolamine

and used NaCl for most of the solutions, for a couple I used sodium sulfate.


--------------------
.


Post Extras: Print Post  Remind Me! Notify Moderator
Jump to top. Pages: 1

Amazon Shop: pH Test Strips

General Interest >> Science and Technology

Similar ThreadsPosterViewsRepliesLast post
* Anyone good at General Chemistry (Buffered solutions, yes, that's right) Hawkeye3 3,631 4 04/10/06 04:40 AM
by ChuangTzu
* Latent Heat Capacity Cepheus 959 11 05/17/08 09:09 AM
by Cepheus
* Format String Attack (you gotta be experienced with coding)
( 1 2 all )
Xeny 2,018 22 03/06/08 06:46 PM
by Diploid
* My new target molecule Toboggan 1,191 11 05/20/07 09:21 PM
by Acyl
* Chem Help !? peace_n_love 391 1 03/05/08 05:19 AM
by johnm214
* What determines an molecules color? Mystic_Cannibal 1,152 3 01/15/08 10:00 PM
by Toboggan
* What would happen if.... (fuel-cells) trendalM 700 5 07/12/08 08:45 PM
by zouden
* Squid authenticating against Win2K Active Directory FlusH 432 0 07/12/06 01:33 PM
by FlusH

Extra information
You cannot start new topics / You cannot reply to topics
HTML is disabled / BBCode is enabled
Moderator: Lana, trendal, automan
668 topic views. 0 members, 9 guests and 0 web crawlers are browsing this forum.
[ Toggle Favorite | Print Topic | Stats ]
Search this thread:
Azarius
Please support our sponsors.

Copyright 1997-2017 Mind Media. Some rights reserved.

Generated in 0.025 seconds spending 0.006 seconds on 19 queries.