South Pasadena  Chemistry
Name __________________________________
Period ___ Date ___/___/___
5  Chemical Reactions
ORNAMENT
LAB CHEMISTRY
Ornament Lab
1. Galvanized iron is Iron (symbol ____) coated
with the active metal, ______ (____).
Note: When an atom’s charge changes, electrons
are gained or lost. This is very important and
deserves a name.
2.
Iron rusts, which means it combines with
oxygen and water. Iron(III) oxide = _______
9.
3.
Rust flakes off the surface of iron exposing
more iron for corrosion. Zinc, forms zinc
oxide _____________, that stays on the surface
and protects the metal.
4.
Write the balanced equation for the reaction
when the ornament was placed in the beaker of
3M HCl.
5.
Consider the formation of rust, Fe2O3.
Fe + O2  Fe2O3
When Fe combines with oxygen, the charge on
Fe changes:
Fe

Fe
The charge __________ (increases/decreases).
This is called “oxidation”.
Neutral Fe has ___ electrons and 26 protons.
Fe3+ ion has ___ electrons and 26 protons.
10. Oxidation:
the charge __________ (increases/decreases)
electrons are _____________ (gained/lost)
Write the balanced equation for the reaction
when the Q-tip of Cu2+ touched the exposed
iron surface.
Reduction:
the charge __________ (increases/decreases)
electrons are _____________ (gained/lost)
LeO the lion says GeR. OiL RiG
6.
Sketch one side of your ornament here:
11.
Zn + 2HCl  ZnCl2 + H2(g)
What is oxidized? _____  _____
What is reduced? _____  _____
12.
2Fe + 3Cu2+  3Cu + 2Fe3+
What is oxidized? _____  _____
What is reduced? _____  _____
7.
8.
When you look at your ornament, you can see
brown areas that are _____________ ( ____)
and shiny areas that are __________ (____).
Look at the equation in Question 4. Do any
atoms change their charge?
Zn

Zn
H

Zn
Cl

Cl
Chemist’s Tree Demo
13. Copper wire (_____) is placed in a solution of
silver nitrate (_____________)
14. The reaction is:
15. What is oxidized? _____  _____
What is reduced? _____  _____