Thursday, March 18, 2010

Reactions the prequal


We added different types of solutions together and saw the out come. We wanted to find out the reactants and the products. By seeing what is left or the presents of hydrogen in the air. Materials 3 test tubes bunsen burner test tube holder striker zinc magnesium ribbon MnO2 CuSO4 Ba(NO3)2 CuSO4 HCl H2O2 Proper safety equipment ( goggles and aprons) Before we did anything we put on goggles to protect our eyes and then put on aprons. First we made a data table, it can be made any way as long as it as a spot for the two reactants and then the observations. We put a piece of zinc into a test tube and added CuSO4 and observed what happened. Then we put Ba(NO3)2 into a test tube and added CuSO4 and made observations. In the last test tube we put magnesium ribbon and added HCl and observed. To test for the presence of hydrogen we lit a stick on fire and put it on the tube ans observed what happened. After that we cleaned the first test tube and added H2O2 heated it and observed what happened then we added MnO2 to it and observed and then heated it and observed.
Reactants Observation Equation Type of Reaction
Zinc and CuSO4 The Zinc changes to a rust color and there is no presence of hydrogen Zn+CuSO4 → Cu+ZnSO4 Single Displacement
Ba(NO3)2 It foamed Ba(NO3)2+CuSO4 → BaSO4+Cu(NO3)2 Double Displacement
Magnesium and HCl It bubbled it is exothermic and popped when fire was put in meaning there was hydrogen being released in the solution Mg+HCl → H+MgCl Single Displacement
H2O2 plus heat the solution bubbled and vibrated when heated H2O2 → H2O+O2 Decomposition
H2O2 and MnO2 plus heat The solution bubbled and turned a black color when heated enough and means oxygen was released during the experinment because the fire burnt up all the oxygen when put into the test tube then went out C3H8+O2 → CO2+H2O Combustion
If we had repeated the experiments multiple times we might have gotten different results.

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