Chemistry in a Bag and Sugar density lab!

In the Chemistry in a Bag lab, we took a small ziplock bag put one scoop of Calcium chloride, small, white, powdery, spheres, and one scoop of sodium bicarbonate, more commonly know as baking powder, and shook it into a corner and twisted it off. Then we added on pipet full of water and one pipet full of Phenol red, a red liquid, into the bag. We pushed out the air and sealed the bag. Then we shook the bag, mixing the various chemicals. The chemicals became warm to the touch then began to turn cold. When the chemicals mixed they turned yellow then later it became orange. Then bubbles were made and gas was produced. filling the bag. When we opened the bag and wafted an odor was produced that smelled like alcohol. We tested some variables to see what caused the reaction. We started by testing Calcium Chloride. It had no odor. Then we tried Sodium Bicarbonate and phenol red. It made a pink powder and was slightly cooler. This also had no odor. Next we tried Sodium Bicarbonate, phenol red, and water. this became cold and liquid pink. It smelled like paint thinner. Finally, we tested Sodium Bicarbonate Calcium chloride, and phenol red. The was cold, yellow, powdery, and a gas was produced. It had an odor like alcohol. This was the closest reaction to the original one.

Questions:

1. Calcium Chloride and phenol red were very hot, whereas Calcium Chloride, Sodium Bicarbonate, and phenol red were very cold.




2. Yes, calcium Chloride and phenol red were very HOT.




3. Yes, in the original, it turned yellow. Calcium chloride phenol red and Sodium bicarbonate made it yellow as well.


4. Yes, when gas is created, a chemical reaction is occuring which produces a temp. change.


5. When the sodium bicarbonate and calcium chloride were mixed together, there was no reaction. In the abscence of water, yes. In the absence of liquid, no.


6. Production of a gas. phenol red and calcium chloride.


7. mix it with different liquids.


8. No it doesn't. It can show that over time, a substance has lost it's kinetic energy. or in some cases, it may have gained some.

In the Sugar density lab we measure the mass and volume of water with 0, 5, 10, 20 percent of sugar mixed in. we also measured water with an unknown amount of sugar. We measured the volume with a graduated cylinder and took the mass of the grad. cylinder minus the mass of the cylinder with the liquid to get the mass of the sugar water. We repeated this proscess to measure the density's of beverages such as Mountain Dew, Dr. Pepper, orange juice, and Nos.