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Water, pH and Macromolecules

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

Theodor Kocher
Karl Hooper
Karl Landsteiner
Otto Warburg

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Water, pH and Macromolecules
H2O and CH4 are both examples of

molecules
ions
none of these
acids

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

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

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Water, pH and Macromolecules
The elements oxygen, nitrogen, and carbon

can all form covalent bonds with other elements
All of these
contain protons and neutrons in their atomic nuclei
are common elements in the molecules that make up living organisms

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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
does not dissolve well in water
is probably held together by noncovalent bonds
contains at least some polar covalent bonds

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

gasoline (heptanes & octanes)
argon
sodium chloride
methane

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