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Water, pH and Macromolecules

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

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

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Water, pH and Macromolecules
Which of the following alcohols would be most soluble in water?

octanol
methanol
butanol
ethanol

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

highly reactive
a hydronium ion
its conjugate acid
its conjugate base

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

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

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

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

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Water, pH and Macromolecules
Weak acids generally have pKa

that cannot be used to buffer
pKa values greater than 2
values less than 1
been seldom found in living systems

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