| time
requ.: |
5 minutes |
|
objective: |
electrochemical reactions |
| material: |
|
|
| chemicals: |
- silver nitrate solution w=0,1%
 
|
- copper foil
- other metals like iron nail,
magnesium, silver
- distilled water
|
|
procedure: |
Fill approx. 2ml
of silver nitrate solution in the beaker and dilute with 8ml water. Put a small strip of
metal
foil or wire into the solution and wait for 2-3 minutes. |
|
observation: |
E.g. Cu: The surface
becomes black, sometimes crystals appear. |
|
interpretation: |
2Ag+(aq) + NO3-(aq) + Cu
---> 2Ag + Cu2+(aq)
+ NO3-(aq)
silver nitrate (dissolved) copper
silver copper nitrate (dissolved) |
|
disposal of: |
Heavy metal
solutions. |
|
source: |
Barke, H.-D. et al.: One Hundred
Chemistry-Experiments to Avoid Chalk and Talk; University of Muenster,
2004. |
