A Buffer Solution Is Prepared by Placing Twice the Concentration

question 34

Multiple Choice

A buffer solution is prepared by placing twice the concentration of propanoic acid (C₂H₅COOH,K_a=1.34 ×10⁻⁵) as the concentration of its conjugate base sodium propanoate into a flask.The pH of the resulting buffer solution is best described as which of the following?

• A)less than 4.87
• B)4.87
• C)between 4.87 and 9.00
• D)greater than 11.00
• E)Undeterminable; the concentrations of the acid and conjugate base must be given.

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Definitions:

Flooding

Flooding is a behavioral therapy technique for treating phobias and anxiety disorders by exposing the patient to fear-inducing stimuli in a controlled environment to the point of extinguishing the fear response.

In Vivo

A term used in research to refer to experiments or studies conducted in the living organism, as opposed to in vitro or in a laboratory setting.

In Vitro

A term referring to processes or reactions occurring in a controlled environment outside of a living organism.

Intensive Exposure

A therapeutic technique involving prolonged and repeated exposure to the stimuli or situations that cause fear or distress, aiming to reduce the associated anxiety.