Chemical Bond Lab

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Chemical bond is an attraction between atoms, which can form chemical substances that contain several atoms. It holds atoms or ions together in a compound. The attraction’s electrostatic force between opposite charges causes the bond. There are three types of chemical bonds and they are covalent bond, ionic bond, and metallic bond. According to the textbook, ionic bonds have high melting points, and conduct electricity only when it is in solution or molten. Metallic solids are also good conductors of heat and electricity and have various melting points. Covalent network solids have extremely high melting points and some conduct electricity. With such information in mind, the goal of this lab is to determine the 12 substances that were first unknown to the class by analyzing its physical and chemical properties and relating them to the chemical bonds. The bonds of the twelve unknown solid samples are determined by dissolving into three liquids, boiling points, conductivities, and pH values. Discussion: In this lab, I learned how to figure out the unknown solid’s bonds by its physical and chemical properties. I dissolved unknown solids in to water, ethanol, and hexane to see whether it is soluble in those solutions. Also, I tried to check the boiling point of the…show more content…
If the solid dissolves in water and conduct electricity then the solid is ionic. However, if the solid dissolves in water and do not conduct electricity then solid is polar covalent because nonpolar covalent and metallic substances usually do not dissolve in water. From these experiments, I concluded that solid #1 is non polar covalent substance, solid #2, 8, 9 are metallic substances, solid # 3, 5 are polar covalent substances, and solid # 4, 6, 7, 10, 11, 12 are ionic substances as I can see in the Figure

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