The PK_a of Lactic Acid Is 3

question 8

Multiple Choice

The pK_a of lactic acid is 3.86. What is the pH of a buffer in which the lactic acid concentration is 2.0 M and the sodium lactate concentration is 0.50 M?

• A) 2.86
• B) 3.26
• C) 4.46
• D) 4.86

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Definitions:

Cribriform Plate

A sievelike structure between the anterior cranial fossa and the nasal cavity, forming part of the ethmoid bone.

Texture

The feel, appearance, or consistency of a surface, substance, or fabric, determined by its physical structure.

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The mechanism through which sensory receptors decrease in sensitivity to unchanging stimuli over a period.

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