Question

For the reaction between sodium carbonate and calcium hydroxide to form a precipitate. Write a net ionic equation for the reaction

Answer 1

Na2CO3+Ca(OH)2=CaCO3(ppt.)+2NaOH

Answer 2

Reaction of sodium carbonate and calcium hydroxide

Explanation:

• When sodium carbonate reacts with calcium hydroxide then sodium hydroxide and precipitate of calcium carbonate will be formed as product.
• The net ionic equation involved is -

     sodium carbonate + calcium carbonate → sodium hydroxide + calcium    

                                                                                                            carbonate        

                                Na₂CO₃ + Ca(OH)₂ →  2NaOH  +  CaCO₃

• Calcium carbonate is used for softening of water and removes temporary hardness.
• Sodium hydroxide is also known as caustic soda.
• When calcium hydroxide reacts with carbon dioxide it forms calcium carbonate which turns milky. The required reaction is -

          Ca(OH)₂ + CO₂ → CaCO₃ + H₂O