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Properties Of Substances Lab Report

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Properties of Substances Express Lab

1)The purpose of this lab was to compare the physical properties of different types of solids and how the properties of solids are determined by their intermolecular forces and their intramolecular bonds. Then we were to classify each type of solid as either ionic, metallic, non-polar molecular, polar molecular, or network. Paraffin wax classified as a non-polar molecular, Silicon dioxide was classifies as a network, Sodium chloride was classified as ionic, Sucrose was classified as polar molecular and Tin was classified as metallic.

(2)The intermolecular forces that are present in Paraffin wax are dispersion forces, because it is non-polar and carries a negative charge. Followed by Sucrose that has …show more content…

Sodium Chloride, is soluble in water, because it is polar and has an alternating negative anion and positive cation. Water is also polar, so like will dissolve in like. Therefore, the negative part of the chloride ions are attracted to the positive side of the water molecule and the negative side of the water molecules is attracted to the positive sodium atom. The negative oxygen charges in water, attract to the positive sodium ions in sodium chloride. Sucrose is soluble in water, because it is a polar molecule and the polar molecules in water attract the positive and negative regions around the sucrose molecules, which allows sucrose to be soluble in water. Therefore, sucrose is able to dissolve in water. However Paraffin wax, Silicon dioxide and Tin, were insoluble in water,because they do not have a charge for electrons to flow and carry electrons. Paraffin wax was insoluble in water, because Paraffin is a non-polar, water is a polar solvent, therefore they can not attract because like cannot dissolve like. Silicon dioxide was insoluble in water, because the vast network of covalent bonds is much stronger than the water-water interactions , therefore the water is not able to break down the molecule to form aqueous ions in water.This results in there being no possible attractions between water molecules with silicon and oxygen, leaving it as insoluble . Tin was insoluble in water, because it has metal bonds with strong intermolecular forces and water does not have the required force to remove these intermolecular attractions, resulting in Tin being insoluble in an aqueous

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