CONCLUSION

CONCLUSION:

 IRON (II) SULFATE HEPTAHYDRATE

We expected that Iron (II) sulfate heptahydrate would dissolve in water but not in acetone and it should conduct electricity. We thought   that it was going to be soluble in water, because as we know, all solid ionic compounds dissolve due to the polar attraction between the water molecules and the ion which makes up the crystal. In ionic compounds, the solids are mostly all of them soluble in water, so that was our thought of to be able to be dissolved by water, however, for our surprise, it did not dissolve, so we researched about it and this because, to dissolve in water because of the forces of water molecules applied in the crystal. If this force is predominant over the ionic compound, the crystal would dissolve. We can consider this as an option of why it did not dissolve, however, we can also consider that the ionic compound did not dissolve because the attraction of oppositely charged ions, that would maintain in the solid state the crystal. For acetone, the same thought, because when we thought that if it was going to be able to dissolve in water, why not in acetone.

Finishing with this substance, we thought that it was going to be able to conduct electricity because it contains Iron, and iron is able to conduct electricity because electrons when dissolved in water as it has charged ions, can move freely.

DICLHORO BENZENE

In this case, everything that we supposed, happened. We learnt of our mistake so we searched first what type of bond was and   from there we took conclusions out. Because it is covalent bond, we know that mostly of covalent ion do not dissolve in water, but   we knew that we different substances, it can, so we decided to put that it was able to dissolve in acetone and it dissolved. 

Finally, we knew it was not going to be able to conduct electricity because in a covalent bond, electrons rarely have a freely flow of electrons.

STARCH

With this, we thought that it would going to happen then same than the last one, however it didn´t. It dissolved in water and not in acetone. But we thought that it was not going to conduct electricity. Starch can be considered a giant covalent molecule as has bonds that hold the different molecules together so it has some slightly different results to a normal covalent compound: The boiling point is going to be higher due to the resistance of the intermolecullar forces, for example.

ZINC

Everything was obvious, because been a metallic bond, it is impossible to dissolve in water or acetone, because the metallic bond has a stronger bond, which has a more resistance againts the forces produced by water and other substances to disolve; and it was going to conduct electricity because it has enough space to allow the  a freely flow of electrons. (this happens in nearly all metallic bonds).

IN GENERAL:

We knew all boiling point and all the test were done without water and we did not test it because we step of that part of the experiment, so we are going to try to find the correct solution: We think that the elements are not conductors, what would make them conductors are the salts and minerals dissolved in water, because is known that pure water does not conducts electricity. We suppose this because when you put inside the river, for example, something that releases electricity, all the part of the river would be affected by the electron.