saturation chart for kalkwasser

[Gary Majchrzak]

does anyone know of a chart that calculates the percentage saturation of kalkwasser based on it's known pH?

TIA :)

[bertoni]

Saturated is about 12.46. Every 0.3 units reduction amounts to a cut of about 50% in concentration. The pH meter is not going to be accurate at 12.46, so I'd make a saturated solution of kalk and measure that as the base.

[tatuvaaj]

Limewater pH also depends on temperature since Ca(OH)2 dissolves better the colder the water is.

[Billybeau1]

<a href=showthread.php?s=&postid=14897672#post14897672 target=_blank>Originally posted</a> by tatuvaaj
Limewater pH also depends on temperature since Ca(OH)2 dissolves better the colder the water is.

I'm not sure there is any truth to that statement. :(

[tatuvaaj]

Well it does :thumbsup:

Here's an example: http://upload.wikimedia.org/wikipedia/en/7/7c/Solubility_Ca%28OH%292.pdf

[HighlandReefer]

Gary,

A conductivity meter is the best way to measure how saturated your kalk is, especially in larger holding containers. ;)

Randy's article explains this much better than I can:

The Degradation of Limewater (Kalkwasser) in Air
http://www.reefkeeping.com/issues/2003-05/rhf/feature/index.php

[Gary Majchrzak]

thanks for all the help :)

taking some cold kalkwasser and boiling it in a pot on the stove sure does yield some interesting observations!

[HighlandReefer]

I would imagine it would be quite tasty with all those heavy metals and calcium carbonate spices. :lol: