Solubility Of Bond Lab Report

Ionic compounds are soluble in water to a certain point depending on the compound. The level of solubility changes among different compounds. Some ionic compounds can completely dissolve in water and appear to be a homogeneous mixture. Although, some ionic compounds dissolve very little, and could be considered insoluble, since it does not dissolve fully. Depending on the compound, the level of solubility can be high or low. However, ionic compounds could dissolve to a certain degree. If the solution appears to be a heterogeneous mixture, many may assume through visual representation that it may be insoluble. As stated previously, the smallest amount of solubility should be considered. To confirm whether or not the substance is soluble, observe the efficiency when conducting electricity. Due to practical reasons, the slightest solubility could be considered insoluble by people.

6. The solubility of the solids were tested using a micro tray, by placing them in water and oil to observe their polarity,

Water (H2O) is a good solvent because it is partially polarized. The hydrogen ends of the water molecule have a partial positive charge, and the oxygen end of the molecule has a partial negative charge. This is because the oxygen atom holds on more tightly to the electrons it shares with the hydrogen atoms. The partial charges make it possible for water molecules to arrange themselves around charged atoms (ions) in solution, like the sodium (Na+) and chloride (Cl−) ions that dissociate when table salt dissolves in water.

By identifying the solubility of the unknown, it could lead to a closer interpretation as to what the functional group the unknown may be. Solubility is determined based on intermolecular attractive forces, such as hydrogen bonding, dipole-dipole, and London dispersion forces. Intermolecular attractive forces arise due to different electron environments in different molecules. For example, water molecules are good at dissolving

solvent- able to dissolve other substances, the liquid in which a solute is dissolved to form a solution

2) Explain the trend in the solubility of the three alcohols in water. (In your discussions, bring out the theoretical concepts on which

A biomolecule can dissolve in water if it can form significant non-covalent interactions with the solvent molecules.

Non-polar covalent bonds cannot dissolve in water because all that the water can do is try to attract the non-polar molecules, but it will only result in a strong hydrogen bond. In addition, since the solvent’s (polar) and solute’s (non-polar) polarity are unalike from each other, that also indicates that it will not dissolve. Also, the non-polar molecules lack positive and negative ends (dipoles), making it hard to form bonds with the water molecules. The reason why non-polar compounds have very low melting points as their only intermolecular force that they posses is London dispersion, which only requires a little amount of energy to split the bond; seeing how electrons in a London dispersion force are distributed all around the nucleus, this factor provides one side of the molecule with more electron density than the opposite side. Just like polar molecules, non-polar bonds cannot conduct electric current as non-polar compounds lack a charge when they are in their molten or solid forms.

Solubility – Very soluble (water), Freely soluble (methylene chloride, chloroform, alcohol), Slightly soluble (acetone) and Insoluble (ether).6 Melting point - 120°C or 248°F.5

Vacuum filtration was then used to dry the precipitate. Polarity is a physical property of compounds which relate to other physical properties. This relates to different bond types: ionic, polar, and non-polar. Trimyristin, for example, is assumed as non-polar. This is assumed as such because trimyristin is soluble in methylene chloride; like substance dissolve similarly as other like substances.

Based on the lab’s results, lipids are soluble in both Acetone and Methanol. However, they are more soluble in the Acetone, and only slightly soluble in the Methanol. Because of the chemical structures, this makes sense, since lipids are insoluble in polar solvents (like methanol), but are very soluble in non-polar organic solvents, such as acetone (Hunt).

The polarity of a molecule is determined by the symmetry and electronegativity of the molecule/charge. We find the symmetry by examining the lewis dot structure of a compound. A non-polar/ and a non-polar molecule can be soluble, but a polar/ionic and non-polar molecule is immiscible. Meaning that in order for a substance to be soluble we need both substances to have the same polarity, so it is immiscible when the substances being poured are not of the same polarity. The rule of solubility and miscibility is “likes dissolve likes”.

Solubility: soluble in methanol, slightly soluble in water (13.4 mg/ml) and very slightly soluble in dichloromethane

I. LIQUID - Identification of an Unknown Liquid: Using the physical properties of Solubility, Density, and Boiling Point.

Solute – A solute is the material (solid, liquid or gas) that is dissolved in the solvent to create the solution.