A Solution Is Prepared by Dissolving 0

question 96

Multiple Choice

A solution is prepared by dissolving 0.23 mol of hydrofluoric acid and 0.27 mol of sodium fluoride in water sufficient to yield 1.00 L of solution. The addition of 0.05 mol of HCl to this buffer solution causes the pH to drop slightly. The pH does not decrease drastically because the HCl reacts with the __________ present in the buffer solution. The K_a of hydrofluoric acid is 1.36 × 10^-3.

• A)H₂O
• B)H₃O⁺
• C)fluoride ion
• D)hydrofluoric acid
• E)This is a buffer solution: the pH does not change upon addition of acid or base.

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Definitions:

Auditory Nerve

The cranial nerve that transmits sound information from the cochlea of the inner ear to the brain, essential for hearing.

Basilar Membrane

A crucial structure in the cochlea of the inner ear, responsible for translating sound vibrations into neural signals by the movement of its hair cells.

Basilar Membrane

A core component of the cochlea in the inner ear, playing a critical role in the sense of hearing by vibrating in response to sound.

Pinna

The visible part of the ear that is outside the head, responsible for collecting sound waves and funneling them into the ear canal.