Ionic Molecules Lab Report

2. I noticed that all of the ionic compounds are soluble in water. This is due to the fact that water molecules are polar. Meaning that they have dipole bonds, which have a slightly positive and slightly negative end due to electronegativity differences between atoms. When ionic bonds are placed in water, they dissociate into their ions (positive and negative) due to the process of dissociation. These ions are then attracted to different dipoles present in the water molecule, in other words the negative ions are attracted to the positive hydrogen pole and the positive ions are attracted to the negative oxygen pole. This process ensures that almost all ionic compounds are soluble in water; some may not be due to percentage of dissociation. In the case of covalent compounds, the trends that I observed were most of them are insoluble in water but as observed here, sucrose is soluble in water.
Although benzoic acid is slightly polar, the benzene ring makes it hydrophobic, which cancels out the polar carboxyl group. As for paradichlorobenzene the chlorine atoms on carbon 1 and 4 cancel each other out, making the overall dipole non-polar. Non-polar molecules cannot dissolve in water because they do not have any partial negative or positive charges or ions to dissociate into in order to be attracted to the dipoles of hydrogen and oxygen in water molecules. On the other hand, an interesting trend that appeared was that sucrose was soluble in water; this is because it is a polar molecule. Due to the vast amount of covalent molecules, many of them are polar and many non-polar. In the case of sucrose, again the dipole charges (both positive and negative) get attracted to the partial charges in water, separating the molecule and allow it to