Ionic Or Covalent Lab Report

2- Three experimental methods that student could use to determine whether the unknown substance is ionic or covalent are as follows:
a) Heath stability experiment: as we learned in experiment 2, Ionic substances have high heat stability. When we heated them over Bunsen burner they always left residue. However, covalent substances have low heat stability and don’t leave residue.
b) Ionic compounds are good electrolytes while covalent substances are either not an electrolytes or a very weak one.
c) Solubility experiment: In experiment 9, we learned that polar substances are soluble in substance that polar most of the time and nonpolar substances dissolve nonpolar substance often. Therefore, we can test the unknown against two known substances for polarity to check if it’s an ionic or covalent.
Conclusion:
In Experiment 9, I learned that we can use the solubility prosperity
I found that among mentioned substances acetone and ethylene glycol are soluble in water, therefore we can say that they are polar substances. Besides, I observed that biphenyl, butyl acetate, glycerol and motor oil are nonpolar substance. These compounds were soluble in hexane. Meanwhile, magnesium oxide and sodium bromide did not dissolved in either water nor in hexane. Moreover, Iodine and aspirin acted different than what I expected. Iodine is a nonpolar substance but not dissolved in hexane. On the other hand, I noticed that aspirin is a nonpolar substance but it did not dissolved in water. Surprisingly, I found that some among above substances glycerol and motor oil which are nonpolar compound are soluble in water as well. Similarly, acetone acted differently too. It dissolved in hexane which is a nonpolar