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

Answer:

a precipitate was produced by chemical reaction