mp4pd5Group+7



Back ground information- In this lab we are using a balance beam, graduated cylinder, net book, sensors, and test tubes. Our group is going to check if there is reactions to the following chemicals. sodium bicarbonate, calcium chloride, water, and bromothymel blue. We will check if there is color change, vapor, precipitation, and temp change. After the test we see in every tube there is a reaction. Most of them turned a different color. We will also use our note books.

Procedure In our group lab we mixed Bromothymal Blue, Calcium Chloride, Sodium bicarbonate, and Water. We mixed these chemicals in many different ways they are Water + Calcium Chloride, Bromothymal Blue + Calcium Chloride + Water, Sodium Bicarbonate + Water, Calcium Chloride + Sodium Bicarbonate, Calcium Chloride + Sodium Bicarbonate + Water, Sodium Bicarbonate + Bromothymal Blue, and all of them together. The things we needed were the chemicals, triple beam balance, temperature sensor, paper, film canister, and test tubes. First weighed the paper and the film canister on the triple beam balance. Next we add .5 to the weight of the paper or film canister. Then we put the chemicals on the balance to find the right amount for the chemical. Then we started to mix each of the chemicals in the test tubes with the temperature sensor in it and then recorded the start temp., end temp., and observations.


 * Mixtures || Start Temperature (C) || End Temperature(C) || Observations ||
 * Water + Calcium Chloride || 21 || 24.6 || no color change ||
 * Bromothymal Blue + Calcium Chloride + Water || 22.9 || 25.3 || cloudy, no color change ||
 * Sodium Bicarbonate + Water + Calcium Chloride || 21.6 || 19.5 || fizzing, white, substance at bottom a solid formed a precipitate forms a gas formed ||
 * Sodium Bicarbonate + Bromothymal Blue || 22.7 || 21.5 || The liquid is slightly lighter ||
 * All of the chemicals || 23.2 || 23.9 || bubbles, precipitate, color change green to yellow to white. ||

Predictions

Our predictions were that the water + Calcium Chloride would sink and dissolve, Bromothymal Blue + Calcium Chloride + water would create an odor, Sodium Bicarbonate + water would just sink in the test tube, Calcium Chloride + Sodium Bicarbonate + water would also sink in the test tube, Sodium Bicarbonate + Bromothymal Blue when mixed together it will become yellow and with all of the chemicals mixed together it would create a new substance.

Summary

In our lab when we mixed the different chemicals together each made a type of chemical reaction.

====Conclusion- What we learned from the reactions is that every one has a different reaction. Most of them were exothermic but baking soda in water made it cooler which is endothermic. The reation with everything resulted in color change, temperature change, gasses, and percipitation. Alot of them went up 5 or 7 degrees. Our line graphs did show big differences exspecially with all three chems combined. But the chemicals just together in two did not have much color change except bromothymel blue.====