The resulting chemical reaction produces a gas, causes a color change with an indicator, and results in a decrease in temperature. Students then carry out a second reaction with calcium chloride and ...

A simple demonstration of how a precipitate is evidence of a chemical reaction taking place is performed by mixing solutions of calcium chloride and sodium carbonate to form the precipitate calcium ...

Sodium becomes a positive ion and chlorine becomes a negative ion. The positive and negative ions attract each other and form the ionic compound sodium chloride. One calcium and two chlorine atoms are ...