You Need to Prepare a Buffer Solution with a PH

question 104

Multiple Choice

You need to prepare a buffer solution with a pH of 4.00, using NaF and HF. What ratio of the ratio of [base]/[acid] should be used in making the buffer? For HF, K_a = 7.2 × 10⁻⁴.

• A)[base]/[acid] = 0.14
• B)[base]/[acid] = 0.42
• C)[base]/[acid] = 2.36
• D)[base]/[acid] = 7.20
• E)None of these choices are correct.

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Definitions:

Operant Conditioning

A learning process where behavior is controlled through consequences like rewards or punishments.

Behavior Modification

A therapy approach aimed at changing undesired behaviors through reinforcement, punishment, and other learning principles.

Modeling

A method used in various contexts, including psychology, whereby learning occurs through the observation and replication of behaviors.

Exposure Therapy

A psychological treatment that helps individuals confront their fears by gradual, controlled exposure to the feared object or context without any danger.