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m
m (reakcije)
 
Svaka od ovih polu-reakcija je reverzibilna, te se stvara [[kemijska ravnoteža]].
 
<chem>{Ca(OH)2} + 2{H3PO4} -> {Ca(H2PO4)2} + 2H2O</chem> - kalcijev dihidrogenfosfat
 
<chem>{Ca(H2PO4)2} + {Ca(OH)2} -> 2{CaHPO4} + 2H2O</chem> - kalcijev hidrogenortofosfat
 
<chem>2{CaHPO4} + {Ca(OH)2} -> {Ca3(PO4)2} + 2H2O</chem> - kalcijev ortofosfat
 
<!--pH at the end-point depends mainly on the strength of the acid, p''K''<sub>a</sub>.
* The pH rises more steeply at the end-point as the acid concentration increases.
When a weak acid is titrated with a strong base the end-point occurs at pH greater than 7. Therefore, the most suitable [[PH indicator|indicator]] to use is one, like [[phenolphthalein]], that changes color at high pH.<ref>{{Cite book|title=Chemical Principles|year=2009|publisher=Houghton Mifflin Company|location=New York|pages=319–324|author=Steven S. Zumdahl|edition=6th}}</ref>-->
 
== Izvori ==
* [[Hrvatska enciklopedija (LZMK)]], Broj 7 (Mal-Nj), str. 650. Za izdavača: Leksikografski zavod Miroslav Krleža, Zagreb 2005.g. ISBN 953-6036-37-1