mp4p1Group+5


 * Chemicals || Temperature Before || Temperature After ||
 * Water and Calcium Chloride || 20.4 || 24.9 ||
 * Water and Sodium Bicarbonate || 19.7 || 19 ||
 * Sodium Bicarbonte, Water and Calcium Chloride || 19.8 || 23.3-25.2 ||
 * Bromothymol Blue and Sodium Bicarbonate || 20.6 || 19.5 ||
 * Bromothymol Blue and Calcium Chloride || 20.6 || 27.3 ||
 * Bromothymol Blue, Sodium Bicarbonate and Calcium Chloride || 20.3 || 21.44 ||
 * Calcium Chloride and Sodium Bicarbonate || 20.1 || 23.4 ||


 * Chemicals || Predictions || Observations ||
 * Water+Calcium Chloride || The compound will bubble and fizz || The calcium chloride and sodium bicarbonate dissolved in the water and formed a precipitate ||
 * Calcium Chloride+Sodium Bicarbonate || Nothing || Nothing happened this pointed to the reasoning that a liquid normally has to be present for a chemical reaction to take place ||
 * Bromothymol Blue+Calcium Chloride || Nothing will happen || The two substances bubbled mildly which instigated the formation of a gas which then means a chemical reaction had taken place ||
 * Bromothymol Blue+Sodium Bicarbonate || change color of liquid and bubble over || Sodium Bicarbonate dissolved and the solution bubbled mildly ||
 * Calcium Chloride+Sodium Bicarbonate+tap water || Bubble extremely || Extreme fizzing sound due to the huge amount of gas bubbling up from the solution ||
 * Sodium Bicarbonate+Calcium Chloride+Bromothymol blue. || Nothing would happen. || The solution of three materials changed the color of yellow let off a foul smelling gas and nearly bubbled over the test tube, proving me completely wrong ||
 * Sodium Bicarbonate+tap water || bubble/fizz || Bubbled and fizzed extremely. ||

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Summary
Some of the chemicals reacted while others didn't. Some reactions were large while others just result in bubbles. Water helps chemicals react, So does BTB. Calcium Carbonate is a white substance that does not dissolve in water. Its used in shells chalk and cement. ** Conclusion **


 * When the water mixed with the calcium chloride, the calcium chloride dissolved because calcium chloride is soluble in water. When the sodium bicarbonate was mixed with the water, the 2 chemicals formed a gas and dissolved because sodium bicarbonate is similar to baking soda, which dissolves and fizzes in water. The result of sodium bicarbonate and bromothymol blue (BTB) was the sodium chloride just sat at the bottom. This means the sodium chloride is not soluble in BTB. The sodium bicarbonate, calcium chloride and BTB formed a gas and a lime colored discoloration at the top of the solution. With the presence of the calcium chloride, the sodium bicarbonate went from sitting at the bottom of BTB to forming a gas and a discoloration. When the calcium chloride, sodium bicarbonate and water were mixed, the 2 chemicals fizzed, formed a gas d dissolved. Nothing happened when the calcium chloride and sodium bicarbonate were mixed together, so this means the 2 chemicals do not react. When the calcium chloride and BTB were mixed together, the result was a gas was formed. **

** Experimental Design ** ** Question: What are some signs that a chemical reaction is occuring? ** ** Hypothesis: We think that in doing this lab, we will find that some mixtures will go through a chemical reaction, while other mixtures will just sit and dissolve in the water ** ** Independent Variable: Combination of the chemicals in the test tube ** ** Dependent Variable: The signs of a chemical reaction ** ** Constants: 5 grams of a substance, 15mL of water or bromythnol blue **

**Question: How does the mass of the reactants compare with the mass of the products when a precipitate is formed?**

**Hypothesis: The mass of the products will be more than the mass of the reactants.**

**Independent Variable: The mass of the reactants in grams.**

**Dependent Variable: The mass of the products in grams.**


 * Lab Group || Mass of the Glassware || Mass of the Reactants Plus Glassware || Mass of the Reactants Alone || Mass of the Products plus Glassware || Mass of the Products Alone || Change in Mass ||
 * 1 || 90.5 || 95.1 || 4.6 || 95.1 || 4.6 || 0 ||
 * 2 || 96.1 || 98.2 || 2.1 || 98.2 || 2.1 || 0 ||
 * 3 || 80.2 || 87.2 || 7 || 87.2 || 7 || 0 ||
 * 4 || 81.7 || 86.8 || 5.1 || 87.2 || 5.1 || 0 ||
 * 5 || 74.2 || 76.4 || 2.2 || 74.2 || 2.2 || 0 ||
 * 6 || 92.9 || 96.8 || 3.9 || 96.8 || 2.2 || 0 ||
 * 7 || 88.5 || 93.1 || 4.6 || 93.1 || 4.6 || 0 ||

Summary: In conclusion, when we mixed the two substances together, they formed a solid that had changed color. The hypothesis that we had was wrong, because the product was the same amount of weight when it had started, than when it had ended. So our hypothesis was wrong, because the substance had stayed the same in weight, instead of getting heavier like we had expected.

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