laxboi33 Posted October 6, 2009 Share Posted October 6, 2009 2H3PO4_Aq_ + 3CA(OH)2 --------> 6H20_liq_ + Ca3(PO4)2_Solid_ complete ionic: 2H3PO4 + 3Ca + 6OH---->6H20+ Ca3(PO4)2 Why doesn't phospohoric acid break down. I understand that it is a strong acid, but could someone give me a better explanation than that? Link to comment Share on other sites More sharing options...
Fuzzwood Posted October 6, 2009 Share Posted October 6, 2009 Because only the first proton can be considered a strong acid. The other 2 are in an equilibrium state. Link to comment Share on other sites More sharing options...
Horza2002 Posted October 15, 2009 Share Posted October 15, 2009 Only the first proton is strongly acidic...after that you would be trying to remove a positive pront from a negative anion (i.e. very hard to do!) Link to comment Share on other sites More sharing options...
hermanntrude Posted October 15, 2009 Share Posted October 15, 2009 in fact phosphoric acid is a weak acid in all three ionisations. The first is a fairly strong weak acid but it's still considered weak. It's Ka (Ka1) is 7.1 x 10^-3. Link to comment Share on other sites More sharing options...
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