Directions. Head each problem carefully and provide a thorough answer in the spa

Question

Directions. Head each problem carefully and provide a thorough answer in the space provided Note each problem may contain multiple questions you need to answer, Make sure that you provided an answer for each question asked within a problem. Briefly explain the chemical basis for the cohesive nature of water. Provide a schematic Of the structure of water to aid your explanation. Explain the chemical basis for the observed ability of water to solvate polar molecules, but only limited solubility of non polar molecules? Include chemical structures if helpful in your explanation. Explain the hydrophobic effect of non polar molecules in water based on thermodynamics principles.

Explanation / Answer

1) The cohesive nature of water is due to its ability to form the hydrogen bonds with other molecules. Due to the presence of electronegative element oxygen attached directly to Hydrogen (H) atoms. H----O-----H There is a posiitve charge created over the H atoms which forms hydrogen atoms and is the reason for cohesive nature of the water.

2) same explanation. Due to its ability to form Hydrogen bonds water can easily solvate the polar compounds. In case of some non polar compounds due to dipole dipole induction it can solvate but not in all cases. Also in these type of compounds the solvation power is decreased as dipole dipole interaction is weak than hydrogen bonds.

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