Chemistry Reactoin in a bag

In chemistry we mixed calcium chloride and sodium bicarbonate together in a bag. We had to shake it until we saw a reaction occuring. A variety of things happened in the bag, such as changing colors and temperature. At first the bag turned pink and then quickly changed to yellow. At this point it was a cold. The yellow then changed to orange and also felt warm, this was the last stage of the reaction. We tested many different chemicals to see what caused the reaction. First we tested calcium chloride and phenol red. The bag turned hot and a dark red, there was no odor. Next we tested sodium bicardonate and phenol red, it turned pink and felt cold. Then we tested the sodium bicarbonate, phenol red, and water and this gave similar results. Last we tested sodium bicarbonate, phenol red, and calcium chloride and it changed color, felt cold, then felt warm. The bag filled up with gas and was yellow.

1. Calcium chloride and phenol red made the bag hot, while sodium bicarbonate and phenol red made the bag cold.

2.Calcium chloride was hot and sodium bicarbonate made the bag cold.

3.In the overall reaction it turned from a yellow then to an orange. In the controlled experiments, the phenol red with calcium chloride or sodium bicarbonate alone would have a pinkish color, but added together with the phenol red they had the yellow then orange.

4.No, it appeared sometimes one would come after or before the formation of gas bubbles, never observed at the same time.

5.We tested no experiments without liquid, it appears to be an important role in creating a reaction.

6.The fact that it changed color, temperature, and also produced a gas. The chemicals are sodium bicarbonate and calcium chloride plus the phenol red.

7.Mix it with water.

8.When a temperature change occurs, it means that something has reacted, it does not necessarily have to have color or other means of change.