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Water the Solvent

 

Structure of Water

Electronegativity--> Oxygen (3.5) vs. hydrogen (2.1), the Bond is very polar covalent.

Water shape is a bent or angular molecule with a bond angle of 105o is a highly polar molecule due to the asymmetrical distribution of charge. 

Molecule Polarity Movie

Hydration of Ionic Solute Molecules

Positive ions attracted to the oxygen end of water

Negative ions attracted to the hydrogen end of water

Animation -->Dissolution of solids   

Dissolution of NaCl in Water Movie

Hydration of Polar Solute Molecules

Negative end of polar solute molecules are attracted to water's hydrogen

Positive end of polar solute molecules are attracted to water's oxygen

"Like Dissolves Like"

Polar and ionic compounds dissolve in polar solvents like water

Nonpolar compounds like fats dissolve in nonpolar solvents like

Chemical Demonstration Videos