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Water, pH and Macromolecules

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

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

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Water, pH and Macromolecules
The dissociation constant of H2O at 25° C is

1014 M
10-7 M
107 M
10-14 M

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Water, pH and Macromolecules
Which of the following indicates that the pK of an acid is numerically equal to the pH of the solution when the molar concentration of the acid and its conjugate base are equal?

Hardy-Windberg law
Michaelis-Menten equation
Henderson-Hasselbalch equation
Haldanes equation

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Water, pH and Macromolecules
Polyprotic acids such as H3PO4, can act as acid-base buffers

at pH values around any of their pKa's
at pH values around neutrality
if their concentration is kept low
only in combination with polyprotic bases

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

argon
methane
gasoline (heptanes & octanes)
sodium chloride

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Water, pH and Macromolecules
The reason that fats contain more energy than simple sugars, is fats have many more

covalent bonds
hydrogen bonds
hydrogen atoms
carbon atoms

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MORE MCQ ON Water, pH and Macromolecules

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