Lab 5B

There were a lot of chemical reactions/experiments that we were supposed to do. The objective  of this lab was to observe a number of chemical reactions. and learn how to differentiate between them. In these reactions there were synthesis, decomposition, single replacement, and double replacement reactions. We did a total of about 7 reactions in this lab.

Here are all of them:

1)  We burned a pice of copper (with O2).
     2Cu + O2 -> 2CuO
     Synthesis reaction

2)  We inserted a nail in a tube with copper solution, and the nail turned red-brownish.
     Fe + CuSo4 -> FeSo4 + Cu
     Single Replacement reaction.

3) We heated a blue crystal like substance CuSO4 ˙ 5H2O, the substance then turned into powder.
CuSO4 ˙ 5H2O -> CuSo4 + H2O
Decomposition.

4) We added a few drops of water to that substance, which made it go back to its original state.
CuSo4 + H2O -> CuSO4 ˙ 5H2O
Synthesis reaction.

5) We added two liquids together, and they had no color. after a while, they formed a percipitate.
CaCl2 + Na2Co3 -> 2NaCl + CaCO3
Double Replacement reaction.

6) We added zinc to a clear solution (HCl), and bubbles were formed.
Zn + HCl -> ZnCl + H2
Single Replacement reaction

7) We added a liquid substance, no color, to a powder like material. When burned, bubbles went up to the surface and gas evaporated.
H2O2 -> O2 +H2
Decomposition.