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Ch. 6 L3: Uniqueness of Water

Pages 70-71

Cathy Myers

on 5 October 2017

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Transcript of Ch. 6 L3: Uniqueness of Water

Properties of Water:
heat capacity
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
-> restricted flow increases viscosity
Uniqueness of Water
Pages 70-71
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
As water reaches its freezing point, the molecules form crystals and lock into place restricting flow and forming a solid. The crystals push apart as they form making ice less dense than water.
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