Mineral Density
Introduction
There are many types of mineral in the world. A mineral is a
substance, which contains only one type of molecule (PbS or NaCl).
Minerals occur naturally as homogeneous solids that have a definite
chemical composition and a distinctive internal crystal structure.
To calculate the density I will be using the formulae:
Density = Mass/Volume
This will give answer in grams per centimeters cubed (g/cm3)
To calculate the density you must know the:
· Mass (measured in grams
· Volume (measured in cm3)
My Aim
My aim is to calculate the density of some common minerals. A mineral
will always have the same density no matter how big or small.
The Apparatus
I have chosen the following apparatus because I believe that they will
produce the most accurate and fair results. These are:
· The Minerals
· A Calculator
· A set of electronic scales
· Water
· A Displacement can
· A Thread
· A beaker
The Method
The first thing, which should be done, is to make a table on some A4
paper to record the results. This should include a column for the
mass, the volume (inside this the four columns three for the three
experiments and one for the averages) and the density.
Then collect the apparatus. See diagram of apparatus on next page.
The minerals need to put with their names (Galena, Basalt) or
numbered, this is to make sure they do not get mixed up.
Select a mineral and weigh it using the electronic scales; make sure
the electronic scales have been set to zero before putting the mineral
on. This is to make it a fair and accurate investigation.
Then record the weight (mass) in the table made earlier.
Carefully tie thread around the mineral so that the mineral can be
placed into the displacement can carefully. This will make it fairer
and an accurate investigation.
Fill the displacement can so that the water is coming out of the
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