mp4pd5Group+2

1.Balance the scale to 0. 2.measure the film canister. 3.Add .5 of NaCHO3 and CaCl2. 4.stir the chemicals together. Our finished products.

__ Combinations a  n  d Observations  __

H2O+NaCHO3- Tempature dropped, disolves, clear, and endothermic. H2O+CaCl2- Exothermic and white. B.B+CaCl2- Light blue. CaCl2+B.B.- White with green bubbles. CaCl2+NaCHO3- Odor and dry. NaCHO3+B.B.- White and sticky.

Background information:

Sodium Bicarbonate: white solid that is crystalline but often appears as a fine powder

Calcium Chloride: salt of calcium and chlorine and is often used as ice and dust control

Bromothymol Blue: is a base and turns yellow when an acid is introduced

H2O: contains 2 hydrogen atoms and 1 oxygen atom

Reactants and Products H2O+NaCHO3 -H2O+Na+C+H+O3 H2O+CaCl2- B.B+CaCl2- CaCl2+B.B.-Ca+Cl2+B.B. CaCl2+NaCHO3-Ca+Cl2+Na+C+H+O3

NaCHO3+B.B.-Na+C+H+O3+B.B