Chemistry in a Bag Lab

Materials:


baggy
safety goggles
calcium chloride
sodium bicarbonate
water
phenol red
pipet
spoon


Observations before lab:


Calcium Chloride were little white balls and solid.

Sodium Bicarbonate (baking soda) was a powder that was white and fluffy.

Phenol Red was a red liquid that stains.

Water was watery. It is a clear liquid.

Lab:

1. Take a spoonful of calcium chloride and a spoonful of sodium chloride and put them in a bag.

2. Seal off the calcium chloride and sodium bicarbonate in a corner of the bag.

3. Put a pipet of water and a pipet of phenol red in the bag separate from the calcium chloride and sodium bicarbonate.

4. Then you seal the bag, shake, and mix them together.

Observations during:

When mixed together it turned a mix between yellow and orange. It got warm and fizzy. It turned into a liquid. The bag then expanded. After that it got cold and bubbly. Once the bag was opened it smelled like alcohol.

Testing substances:

*No need to test calcium chloride + sodium chloride because they were placed together in the bag. Same goes for phenol red + water.

1. calcium chloride + phenol red = yellow at first, then a pinkish red color and hot. calcium chloride balls stayed as balls.

2. sodium bicarbonate + phenol red = sandy and pinkish red

3. calcium chloride + water = calcium chloride dissolves, stays watery

4. water + sodium bicarbonate = cold, milky, fizzy/bubbly

5. phenol red + water + calcium chloride = hot and dark red

6. phenol red + water + sodium bicarbonate = cold and red

7. phenol red + calcium chloride + sodium bicarbonate = warm then cold, was yellow and cold

8. water + calcium chloride + sodium bicarbonate = got warm and gas was produced

Post-Lab questions:

1. The phenol red caused the color change. Calcium chloride caused the heat. The sodium bicarbonate, water, and calcium chloride produced gas.


2. In the original experiment it was hot then cold. In the individual experiments without calcium chloride, it did not get hot.


3. In most individual experiments it got red, but when they were all combined it got yellowish orange.


4. Yes, the fizzing and formation of bubbles happened as the temperature was changing and the color was changing.


5. A liquid is needed to make a change. Without water nothing dissolved but temperature and color changes did occur without water.


6. With everything together it becomes a liquid, it smells different, looks different, and feels different so it is most likely a whole new substance when they are all combined. To get the new substance for the original experiment, all the substances are needed.


7. Just mixing calcium chloride and water will test if their is a chemical reaction between them. If anything changes then their identities are changed.


8. A temperature change does mean a chemical reaction has occurred because they have combined and changed something about each other.