Chemistry in a Bag

Procedure:

• 1 scoop of calcium chloride in the plastic bag



• 1 scoop of sodium bicarbonate in the plastic bag



• keep both of the dry solutions together by twisting the bag before you place the liquids



• 1 pipette of phenol red in the plastic bag



• 1 pipette of water in the plastic bag



• after all these ingredients are in the bag untwist the bag and shake the ingredients together

Observations:

• orange-yellow



• got warmer after we started shaking the ingredients together
  


• bag started to fill with air



• then became colder



• once the reactions were done we opened the bag and wafted, it smelled kinda gassy

Trials:

Baking soda & phenol red

• pink


• cold

Calcium & phenol red

• balls turned orange at beginning


• pink


• hot!


• smelled bad

Calcium & water

• white


• hot


• kinda smelly

Water & baking soda

• white


• cold


• no gas

Questions:

1. The Calcium chloride cause the temperature change to very hot.

2. The controlled experiments without calcuim chloride did not turn hot.

3. The color observed in the overall reaction was orange. The cause of the color change could not be found in the controlled experiment.

4. The temperature changed before the gas bubbles formed.

5. All the experiments require liquid for any reaction to occur.

6. Gas is the substance formed when all chemicals are mixed in the bag. Chemicals that are responsible are both solids and water.

7. An experiment that could be tested is adding diffrent amounts of water with calcium chloride to see if any changes occur.

8. Temperature change dosent always indicate a chemical reaction because you could see a color change or a phisyical change.