using the ca2+ electrode and equilibrium dialysis of nahco3-cacl2-nacl solutions ( 24 +/- 2 degrees c ; total ionic strength = 0.153-0.161 ) , studies were made at variable ph and total calcium and carbonate concentrations to determine the formation constants of the three possible calcium complexes : cahco3+ , cac03 ( 0 ) , and ca ( hco3 ) 20 .
C0007026
carbonate
C0005367
hco3