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 ...

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 ...

Calcium plus hydrochloric acid gives us calcium chloride. And zinc plus sulphuric acid gives us zinc sulfate. And the salt that we put on our food is produced when sodium reacts with hydrochloric ...