May 25, 2020, 02:20:17 AM
Forum Rules: Read This Before Posting


Topic: What combines with calcium to produce lake whitening (calcium carbonate)??  (Read 2708 times)

0 Members and 1 Guest are viewing this topic.

Offline Barelover

  • Very New Member
  • *
  • Posts: 2
  • Mole Snacks: +0/-0
Hi :)

This may seem like an obvious question but can someone please help me.  I know that lake whitening it caused by the formation of calcium carbonate, but what combines with calcium to form calcium carbonate??

I think it it possibly HCO3-, or H2CO3??? 

Thank you.

Offline DeP

  • New Member
  • **
  • Posts: 5
  • Mole Snacks: +0/-0
Re: What combines with calcium to produce lake whitening (calcium carbonate)??
« Reply #1 on: December 07, 2010, 02:28:53 PM »
Hey,

CO2 dissolves in water to form H2CO3.
H2CO3 is in equilibrium with H+ and HCO3- and this in turn is equilibrium with H+ and CO3²-.
 And CO3²- can precipitate with Ca²+ as CaCO3

This happens in neutral to basic (so that the equilibrium goes complete to the right) and cold waters (CO2 dissolves beter in cold water).

Sponsored Links