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Chemistry Solubility

In: Science

Submitted By Jacintah
Words 3033
Pages 13
Jacinta Houng
Comparing the Solubility of Chemicals in Water
“Water is known as the “universal solvent” because so many different substances dissolve in it and we rely on this for many of our daily needs.”
Introduction: Water is known as the ‘universal solvent’ as it is capable of dissolving a variety of different substances and dissolves more substances than any other liquid. However the ability to be soluble depends on a substances polarity and bonding. This then contributes to the various ways that different types of chemicals interact in water.

Solubility is crucial to every living thing on earth as water can carry along valuable chemicals, minerals, and nutrients necessary for survival. In fact Water covers 70% of the Earths surface and composes 55-70% of the human body.
Water is an excellent solvent due to its chemical composition and physical attributes.

According to USGS (http://water.usgs.gov/edu/qa-solvent.html ) Water molecules have a polar arrangement of the oxygen and hydrogen atoms—one side (hydrogen) has a positive electrical charge and the other side (oxygen) has a negative charge. A polar bond is a covalent bond between two atoms where the electrons forming the bond are unequally distributed. This causes the molecule to have a slight electrical dipole moment where one end is slightly positive and the other is slightly negative. "Like dissolves like" is an expression used by chemists to help them remember how solvents work. The expression refers to "polar" and "nonpolar" solvents and solutes. For example water is polar and Oil is non polar thus water will not dissolve oil. Therefore nonpolar molecules don't dissolve very well in water, including many organic compounds, such as fats and waxes. Water molecules can become attracted to several other types of molecules due to its polar bonds. Water can become so heavily attracted to a different...

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