Reef Central Online Community

Home Forum Here you can view your subscribed threads, work with private messages and edit your profile and preferences View New Posts View Today's Posts

Find other members Frequently Asked Questions Search Reefkeeping ...an online magazine for marine aquarists Support our sponsors and mention Reef Central

Go Back   Reef Central Online Community Archives > General Interest Forums > The Reef Chemistry Forum

 
 
Thread Tools Search this Thread Display Modes
  #1  
Old 04/10/2005, 11:42 AM
shelburn61 shelburn61 is offline
Registered Member
 
Join Date: Oct 2004
Location: Charlotte
Posts: 1,285
does 12 pH of Kalk correlate to saturation

I used a sealed bucket as my kalk "reactor". I don't stir it but the pH stays around 12.3. Does this necessarily mean the CaOH is remaining in solution? Are these numbers dependant?
  #2  
Old 04/10/2005, 01:00 PM
Randy Holmes-Farley Randy Holmes-Farley is offline
Reef Chemist
 
Join Date: Apr 2001
Location: Arlington, Massachusetts
Posts: 52,068
The pH of saturated limewater is 12.54 at 25 deg C. At lower temperature, but still saturated, the pH is higher. pH is not an especially good way to monitor limewater saturation because it only drops about 0.3 pH units when the concentration drops by a factor of 2. But it is qualitatively useful to compare the pH side by side of a saturated limewater standard (say, 2 teaspoons in a cup of water) to whatever you want to measure.

Conductivity is a better way to measure limewater potency, and I show how to use it in this article:

The Degradation of Limewater (Kalkwasser) in Air
http://reefkeeping.com/issues/2003-0...ture/index.htm
__________________
Randy Holmes-Farley
 

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -5. The time now is 04:15 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Use of this web site is subject to the terms and conditions described in the user agreement.
Reef Central™ Reef Central, LLC. Copyright ©1999-2009