Tuesday, September 27, 2011

Chemistry in a Bag

In Chemistry in a bag we placed a spoonful of Calcium Chloride, and a spoonful of Sodium Bicarbonate in a pipit full of Phenol Red, and a pipit full of water into a bag sealed with little to no air left inside. After we did this, we mixed the bag from the bottom and all of the materials combined. When all this happened one person continued to shake and the other person wrote down the observations

Materials:
1.)Calcium Chloride
2.)Sodium Bicarbonate (Baking Soda)
3.)Phenol Red
4.)Water

Observations:
It turned yellow, bubbly, and it got hotter
Then it turned to a liquid and got cold, still yellow
The bag expanded and about exploded but it didn't
It smelled like permanent marker

Warnings:
Phenol red stains clothes and won't come out.

We then tested to see what material contributed some of these senses.

First we tried out the Phenol Red and Sodium Bicarbonate. We noticed that the combination turned a bright pink. We wafted it and it smelled like a sharpie.
Then we tried the Phenol Red and the Calcium Chloride, it started to heat up and turned a shade of red. We opened it up and wafted, it smelled like a sharpie. From this we could tell that the Phenol Red is the cause of the sharpie-like smell.
We tried the Calcium Chloride and water. The water dissolved the Calcium Chloride and the liquid became cloudy. We also noticed that the temperature rised, from this we concluded that the heat came from the Calcium Chloride.
Baking Soda and water started to fizz and the water then got cloudy. From this we could tell that the Baking Soda was the cause of the fizzing in the Chemistry in a Bag.
We tried out the Baking Soda and the Calcium Chloride nothing happened.
Our last test was the Sodium Bicarbonate, Calcium Chloride and Phenol Red. Our first observation was it dissolving the Calcium Chloride and turning yellow, there was no fizzing without the water.

Post-Lab Questions
1.) The Calcium Chloride causes the heat, the Sodium Bicarbonate causes the fizzing and expanding, the Phenol Red is the cause of the smell, and the Phenol Red is also part of the color

2.) The temperature rose, but no combination ever turned colder at the end, it just stayed warm

3.) No, we combined all the chemicals and we never got a yellow color. It was either red, or bright pink.

4.) Yes, as the fizzing occured, the color turned from red to yellow.

5.) Water is needed to complete the thing, all liquids were required in order for this experiment to work out. Without the water there would not be any fizzing. Because there is nothing to react with the Baking Soda.

6.) Because there wasn't any 2 chemical combination to get the yellow coloring, we tried out the Baking Soda, Calcium Chloride and the Phenol Red and got yellow color.

1 comment:

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