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Water, pH and Macromolecules

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

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

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

Theodor Kocher
Karl Landsteiner
Karl Hooper
Otto Warburg

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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?

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

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

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

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Water, pH and Macromolecules
A Bronsted acid becomes __________ upon losing a proton.

its conjugate acid
a hydronium ion
its conjugate base
highly reactive

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Water, pH and Macromolecules
The effectiveness or capacity of a buffer solution can be affected by

molar concentration of the buffer components
both (a) and (b)
temperature of buffer components
concentration of the conjugate base to the weak acid

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