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5 questions
Q.
An unusual characteristic of H2O is:
Greater density in solid form (ice) than in liquid form
(water).
High heat of vaporization.
Low specific heat.
Not readily forming intermolecular interactions.
Weak noncovalent interactions:
Can have a large cumulative effect.
Always involve water.
Do not include ionic interactions.
Combine to form covalent interactions.
I need to calculate the pH of a weak acid. I know the concentration of the acid and its conjugate base, and my solution is at 30 °C. Using the Henderson-Hasselbalch equation, what else do I need?
The Kd for H+ of the acid
The free-energy change for the release of the H+
The total H+ concentration (that is, free and bound to the acid)
The pKa of the acid
What is the concentration of H+ in a solution of 0.01 M NaOH? Because NaOH is a strong base, it dissociates completely into Na+ and OH–
0.01 M
10^(–12) M
10^(–14) M
10^(–13) M
Generally, physiological pH:
Is near 7.
Must be within one pH unit of its pKa.
Is determined from its titration curve.
Is between 9.35 and 9.45.
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