Interaction | Reaction | Process     Data Page

Calcium bicarbonate (which is unstable out of solution) causes temporary water hardness. This hardness can be removed by "lime softening" with calcium hydroxide and removing the precipitated calcium carbonate.
Ca2+
  +  
2
[HCO3]–
  +  
Ca(OH)2
         
2
CaCO3
  +  
2
H2O
Reactant Page Go To Go To
Calcium ion     Reactions Using    Reactions Forming
Bicarbonate ion     Reactions Using    Reactions Forming
Calcium hydroxide     Reactions Using    Reactions Forming
Calcium carbonate     Reactions Using    Reactions Forming
Water     Reactions Using    Reactions Forming

Interaction, Reaction, Process defined as:
Acid + Base -> Salt + Water
British A-Level Chemistry: AS
Precipitation
Proton transfer: Brønsted reaction

© Mark R. Leach 1999 –

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