Objective – Determine the identity of an unknown metal by measuring its density and observing its physical properties.
Materials
50 ml graduated cylinder
2 Beakers
Samples of metal A and B
Tongs
Procedure
Place Sample A in 40 ml of water and
measure water displaced.
Place Sample B in 40 ml of water,
measure water displaced.
Mass each sample separately.
Determine the densities.
Calculations:
|
|
Sample A |
Sample B |
|
State |
Solid |
Solid |
|
Color |
Silver |
Dark Grey |
|
Luster |
Shiny |
Dull |
|
Texture |
Smooth |
Rough |
|
A |
Mass=14.3g |
Volume=1.4cm^3 |
|
Density=8.4 g/cm^3 |
|
|
|
B |
Mass=33.13g |
Volume=4.5
cm^3 |
|
Density=7.36 |
|
Conclusions:
Material A is Nickel
Material B is Antimony
There could be possible error in the
density due to the lack of accuracy in the volume-measuring device. Because it was only accurate to the ones,
the density can’t be accurate to the tenths or hundredths.