Determination of the formula of hydrated iron sulphate

This essay hasn't yet been marked by one of our teachers

You can view 10 essays on Classifying Materials that have been Marked by Teachers

The first 200 words of this essay...

Determination of the formula of hydrated iron sulphate

Analysis

Method 1

Results

Mass of iron sulphate before heating

1.372

Mass of iron sulphate after heating the 1st time

0.698

Mass of iron sulphate after heating the 2nd time

0.718

Mass of iron sulphate after heating the 3rd time

0.720

Mass of iron sulphate after heating the 2nd time

0.720

Final mass of iron sulphate after heating

0.720

The mass of FeSO4. xH2O I weighed out to begin was 1.372g.

After heating the mass was 0.720g. Having heated the FeSO4. xH2O all of the water has evaporated out so the mass that I am left with is the mass of FeSO4 which was 0.72 g.

The mass of the H2O can then be calculated by subtracting the mass of FeSO4 from the mass of FeSO4. xH2O. Therefore;

Mass of H2O = Mass of FeSO4. xH2O - Mass of FeSO4

Mass of H2O = 1.372 - 0.72

Mass of H2O = 0.652g

So I now know both the mass of H2O and the mass of FeSO4 .

This means that