BIO211Ch3.Water_LifeBB

BIO211Ch3.Water_LifeBB - 3 Water and Life Water and...

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    3. Water and Life Water and H-bonding Properties of water Solute Concentration pH: Acids, bases and buffers.
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    Water on earth is essential for life.
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    H- bonding of water
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    H-bonding in water and in ice
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    Properties of water 1. Cohesiveness 2. High specific heat 3. High heat of vaporization 4. Freezing and expansion 5. Versatile solvent 6. Medium for biochemical reactions
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    Aqueous Solutions Water based solutions   solvent + solute   solution Two major properties Solute concentration  pH, a measure of H +  concentration
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    Molarity Mole:  1 mole = 6.022 x 10 23  molecules For practical purpose,  MW in g is used as a mole. Molar solution = g MW in a liter of  solution MW or FW (g/mole) x Volume (l) x molarity (mole/l) = g
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    Eggs and Moles
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    Making Molar Solutions From Solid to solution: Use  MW or FW (g/mole) x M (mole/l) x liters (l)
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BIO211Ch3.Water_LifeBB - 3 Water and Life Water and...

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