Reaction lab

Reactions  lab
   In this lab we experienced 7 different types of reactions. We observed and discovered characteristics  of these different reactions and even wrote formulas for these reactions.

Reaction 1:
        What we used: hydrochloride acid, magnesium metal, test tubes, match
         What we did: we took a test tube and filled it up about half way with hydrochloride acid. Then we put in a piece of magnesium metal and covered it with anther test tube.  The magnesium started bubbling and it made the tube foggy.  Once the magnesium metal stopped bubbling, we lit a match and stuck it in the tube that was covering the acid. The reaction there seemed to make a mini explosion, it even made a noise that made some people jump.
          The formula: 2HCI + Mg---->MgCI2+ H2
                  (single replacement)

Reaction 2:
        What we used: Bunsen burner, magnesium, tongs,
        What we did: we lit the burner and then held a strip of magnesium over the burner till the reaction took place. The magnesium made a really bright white light.
         The formula: 2Mg + O2----> 2MgO
                     (single replacement)
Reaction 3:
         What we used:  copper wire, sand paper, tongs, Bunsen burner,
         What we did:  we took the copper wire and shined it up with sand paper. Then we held the wire over the burner for a couple of minutes. The reaction seen was that the wire started to glow.
           The formula: 2Cu(s)+ O2(g)----> 2Cu(s)
                    (double replacement)

Reaction 4:
         What we used: ammonium carbonate, test tubes,  burner
         What we did: we added a little ammonium carbonate into a test tube and then we heated the test tube. And then we waft the smell of the gas and it smelt like baking powder.
           The formula: (NH4)2+CO2----> Co2+ H2O +2NH3
                     (combustion)

Reaction 5:
        What we used: hydrogen peroxide, manganese dioxide, test tube, match
        What we did: we filled half way a test tube with hydrogen peroxide and then added a little bit of manganese dioxide. There seemed to be a separation, like two different layers. When we put in the glowing match the top layer seemed to explode into flames.
         The formula: 2H2O2MnO2-----> 2H2O+O2
                 (single replacement)

Reaction 6:
       What we used: potassium iodine, test tube, lead(II)nitrate
       What we did: we poured potassium in one test tube and lead(II)nitrate into two different tubes. They were two different colors. Then we mixed them together and the solution got turned yellow.
        The formula: 2KI+Pb(NO3)2---> 2KINO3+ PbI2
               (double replacement)

Reaction 7:
       What we used: copper(II) carbonate, test tube, test tube holder, match
        What we did: we poured a little copper(II) carbonate into a test tube and then we heated it up while cover it with anther test tube. After that we lit a match and put it in the test tube and the smoke formed out.
      The formula: CuCo3--->CuO+CO2
             (decomposition)

In this lab we seen many reactions and learned how mixing or adding heat will cause a reactions.