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Water, pH and Macromolecules

Water, pH and Macromolecules
Who discovered and described the blood groups (ABO) classification?

Otto Warburg
Karl Hooper
Theodor Kocher
Karl Landsteiner

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Water, pH and Macromolecules
The strength of an acid depends on

number of double bonds
number of protons released
number of neutrons gain
electronegativity

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Water, pH and Macromolecules
The lone pair electrons on oxygen in a H20 molecule

form covalent bonds in ice
carry a partial positive charge
are not important for the properties of water
carry a partial negative charge

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Water, pH and Macromolecules
What is the concentration, in moles/liter, of the hydrogen ion, if pH of a solution is 7?

7
1 x 10-7
5 x 10-7
7 x 10-7

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Water, pH and Macromolecules
Which of the following will easily dissolve in a polar solvent?

gasoline (heptanes & octanes)
argon
methane
sodium chloride

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Water, pH and Macromolecules
A solution with pH = 5 is __________ than a solution with pH = 7.

10 times more basic
10 times more acidic
2 times more basic
100 times more acidic

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