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Water, pH and Macromolecules

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

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

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

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

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

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

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Water, pH and Macromolecules
A compound that is capable of forming hydrogen bonds with water

should act as a good buffer for acids and bases
is probably held together by noncovalent bonds
contains at least some polar covalent bonds
does not dissolve well in water

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

Theodor Kocher
Karl Hooper
Otto Warburg
Karl Landsteiner

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

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