Question

A student adds a small amount of sodium carbonate (Na2CO3) solution to a test tube containing calcium chloride (CaCl2) solution. A white solid immediately appears.



What conclusion can be made from this experiment?


Heat is generated by the chemical reaction

The chemical reaction requires energy to occur

A precipitate was produced by the chemical reaction

Light was produced by the physical reaction

Answer 1

A precipitate was produced by the chemical reaction.

Answer 2

While performing the following experiment, a precipitate will be produced by the chemical reaction.

• $Na_2CO_3$ (sodium carbonate) and $CaCl_2$ (calcium chloride) react with each other to give a precipitation reaction.
• The products formed after the reaction are $CaCO_3$ (calcium carbonate) and $NaCl$ (sodium chloride).
• $CaCO_3$ is a white precipitate that gets collected at the bottom of the tube in which the reaction took place.

∴ A precipitate is produced in the given chemical reaction.