p5g1+mp2

Combination: H20 + NaHCO2 = Observation is that the temperature drops. The NaHCO2 is dissolving. The water became clear and it was an endothermic reaction. H20 + CaCl2 = Observations is that the temperature is going up. The CaCl2 dissolved and the liquid became cloudy. It was an exothermic reaction. Bromothymol Blue + Calcium Cloride = Observations is that there is no color chnge. Exothermic reaction. NaHCO3 + CaCl2 + H20 = Observations is that it produced a gas of carbon dioxide. There was bubbles and the water then turned pure white.

Summary: During this lab, some of the reactions were that they dissolved, the color changed, a gas formed, and most of the time, the temperature changed. H2O + NaHCO3 dissolved, absorbed energy, became clear, and the temperature dropped, making it an endothermic reaction. H2O + CaCl2 dissolved, the water got cloudy, and it let off energy making it an exothermic reaction. BB + CaCl2 + (H2O) did not have any color change, and was an exothermic reaction because the temperature went up. CaCl2 + NaHCO3 + H2O a participate formed, it was not soluble and it settled out, it produced a gas, and was an endothermic reaction. NaHCO3 + BB dissolved and was an exothermic reaction. NaHCO3 + CaCl2 + BB + (H2O) turned yellow and a gas formed; foam formed on the top of the liquid and turned green then went down. Lastly, CaCl2 + NaHCO3 only mixed together, and the temperature increased. Observations: H2O+NaHCO3-Dissolved,absorbed energy(temp. drop) becomes clear, endothermic. H2O+CaCl2- Starting 19.6 c, chemical-27.2 c, dissolved and let off energy(temp hot), exothermic- Cloudy water. BB and CaCl2(H2O)- Starting 21.7 c, no color change, exothermic, temp went up, stopped temperature 27.5 c.

Water+CaCl2- I think that the CaCl2 will dissolve in the water and become foggy Bromothymol+CaCl2- I think it will become yellow and the CaC2 will dissolve. NaHCO3+H20- I think that the naHCO3 will dissolve and the H20 will become cloudy or foggy. CaCl2+NaHCO3-I don’t think they will really do anything but mix with each other. CaCl2+NaHCO3+H20- Temperature change, gas formed and precipitate formed. NaHCO3+BB- Temperature change and color change