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Ch. 6 L3: Uniqueness of Water
Transcript of Ch. 6 L3: Uniqueness of Water
polarity = quality of having opposite charges for different points of a molecule
-> distribution of electrons in the molecule is uneven, causing certain parts to be slightly negative
-> called polar molecules
-> bcse of polarity, hydrogen bonds form
hydrogen bond = a weak bond that connects hydrogen-containing molecules
(similar to opposite poles of magnet attracting)
can dissolve many substances
-> solubility = the ability of one substance to dissolve another
known as universal solvent
expands as it freezes
-> most dense at 4 degrees C/39 degrees F
-> density increases as it reaches freezing point bcse molecules form crystals and lock into place restricting flow
-> restricted flow increases viscosity
Uniqueness of Water
surface tension = elastic property of liquids that allows drops to form and creates the smallest area possible at the surface of a liquid
-> water remains in a glass even when it is slightly over the top
-> in a graduated cylinder water is slightly higher on sides than in middle
viscosity = the resistance of a liquid to flow