Kitchen Chemistry Experiment 10
Micro-Reaction Lab: Single Replacement

Procedure

1. Use one piece of each solid (Cu (s) and Zn (s)) or the tip of a spatula for granular solid (Al (s)).
2. Use 8-10 drops of each solution required.
3. Note any signs of gas production or color changes.
4. Use the Activity or Electromotive Series to help predict if a replacement reaction should occur.
5. Write a balanced formula equation for any reactions that do occur. Include physical state symbols for the reactants and products..

Teacher's Notes

I. Zn (s) + CuSO4 (aq) --------> Cu (s) + ZnSO4 (aq)
Copper solid forms on zinc.

II. 2Al (s) + 3CuSO4 (aq) --------> 3Cu (s) + Al2(SO4)3 (aq)
Copper forms onto aluminum.

III. Zn (s) + AgNO3 (aq) ---------> Ag (s) + ZnSO4 (aq)
Shiny silver crystals grow on zinc solid.

IV. Cu (s) + 2AgNO3 (aq) --------> 2Ag (s) + Cu(NO3)2 (aq)
Shiny silver crystals grow on copper solid.

V. Zn (s) + Pb(NO3)2 (aq) ---------> Pb (s) + Zn(NO3)2 (aq)
Dull gray lead forms on pieces of zinc.

VI. Cu (s) + Pb(NO3)2 (aq) ---------> No Reaction.
Copper will not replace lead.

VII. Zn (s) + 2HCl (aq) ---------> ZnCl2 (aq) + H2 (g)
Zinc reacts with acid and hydrogen gas is released.

VIII. 2Al (s) + 6HCl (aq) ---------> 2AlCl3 (aq) + 3H2 (g)
Aluminum reacts with acid and hydrogen gas is released.