mp4p3Group+2

__**A.M.A. **__ **(Amina, Max, and Austin's Group.) ** 1. Background Blue changes to a yellow color in I an acid solution and blue in an base solution || ||
 * chemical || molecule || information || images ||
 * Water || H 2 O || Water is non toxic. People need water to survive. It is liquid. || [[image:http://osawaterworks.com/images/water%20art-4.jpg width="192" height="148"]] ||
 * Calcium chloride || CaCl 2 || It is soluble in water and it needs to be kept in a air tight container so it does not absorb moistur || [[image:http://www.chemical-engineering.co/wp-content/uploads/2011/07/CALCIUM-CHLORIDE.jpg width="192" height="116"]] ||
 * Sodium bicarbonate || NaCHO 3 || Sodium bicarbonate is baking soda. It is non toxic and it is a solid powder. || [[image:http://www.chemicalformula.org/images/sodium-bicarbonate.jpg width="162" height="115"]] ||
 * Bromothymol blue || C 27 H 2 Br 2 O 5 S || Bromothymol

2. Experimental Design Question: What are some signs that a chemical reaction is taking place? Hypothesis: If there is a color change, gas bubbles form, or a percipitate forms, then a chemical reaction is most likely taking place. Independent Variable: Combination of chemicals in the test tube. Dependent Variable: Signs of chemical reactions. Constants:
 * **Levels ** ||  ||   ||   ||   ||   ||
 * **Repeated Trials ** ||  ||   ||   ||   ||   ||

3. Data (Results, Observations, and Predictions) Predictions Bromothymol Blue and Sodium Bicarbonate We thought that Bromothymol Blue and Sodium Bicarbonate would form gas bubbles in the test tube and also change to color to green after a little stir. Calcium Chloride and Sodium Bicarbonate We thought that Calcium Chloride and Sodium Bicarbonate would mix together in the test but not really have any chemical reaction like gas bubbles. Water and Sodium Bicarbonate We thought that Water and Sodium Bicarbonate would mix. Then the Sodium Bicarbonate would turn into a precipitate and then sink to the bottom. Calcium Chloride and Bromothymol Blue We thought that Calcium Chloride and Bromothymol Blue would change temperature. Then it would form a precipitate and fall to the bottom. Also we thought that when they mix the color would change to a greenish yellow. Calcium Chloride and Water We thought that Calcium Chloride and Water would mix together and gas bubbles will form. Also we thought that it would form a precipitate and the calcium chloride would fall to the bottom.

Sodium Bicarbonate and Calcium Chloride and Water We thought that sodium bicarbonate, calcium, and water would form a precipitate from the calcium chloride and sodium bicarbonate mixing together. Also we said it would not become a suspension but it would go to all parts of the water and therefore it would be soluble in water. Sodium Bicarbonate, Calcium Chloride, and Bromothymol Blue We thought that sodium bicarbonate, calcium chloride, and bromothymol blue would have a change in temperature and also all the parts would mix together and changing the color of the new compound.

Observations
 * Bromothymol Blue & Baking Soda  ||   The baking soda sank to the bottom and sort of formed a precipitate, but then the baking soda mixed with the bromothymol blue.   ||
 * Calcium Chloride & Bromothymol Blue  ||   It had a slight temperature change form 21 degrees Celsius to 24.5 degrees Celsius. Also it had a precipitate and the color changed to a lighter blue.   ||
 * Water & Baking Soda  ||   The temperature changed from 18.5 degrees Celsius to 19.3 degrees Celsius. There were also some gas bubbles at the top.   ||
 * Calcium Chloride & Baking Soda  ||   When we stirred it mixed together but nothing really happened between the two substances.   ||
 * Calcium Chloride & Water  ||   They mixed together and that means calcium chloride is soluble in water and bubbles formed and there was a precipitate.   ||
 * Baking Soda & Calcium Chloride & Water  ||   There were gas bubbles and a precipitate. Then the baking soda and calcium chloride sank to the bottom. After that we found out that the temperature change slightly, starting from 19.6 degrees Celsius to 20.3 degrees Celsius.   ||
 * Baking Soda & Calcium Chloride & Bromothymol Blue  ||   This combo had gas bubble forming at the top while the color also changed to white with a little green on top. The temperature also changed by .3 degrees Celsius.   ||

4.Pictures







5. Summary

6. Equation

7. Conclusion