Assuming Equal Concentrations of Conjugate Base and Acid, Which One

question 7

Multiple Choice

Assuming equal concentrations of conjugate base and acid, which one of the following mixtures is suitable for making a buffer solution with an optimum pH of 4.6-4.8

• A) CH₃COO₂Na / CH₃COOH (K_a = 1.8 * 10^-5)
• B) NH₃ / NH₄Cl (K_a = 5.6 *10^-10)
• C) NaOCl / HOCl (K_a = 3.2 * 10^-8)
• D) NaNO₂ / HNO₂ (K_a = 4.5 * 10^-4)
• E) NaCl / HCl

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Definitions:

Pain Receptors

Specialized nerve endings that transduce pain stimuli into nerve signals that are interpreted by the brain as the sensation of pain.

Anticipation

The act of expecting or predicting something to happen based on prior knowledge or cues.

Sensations

The immediate experiences generated from the stimulation of sensory organs by external stimuli.

Substance P

A neuropeptide involved in the transmission of pain and other sensory signals to the brain, also implicated in inflammatory processes and mood regulation.