Which Pair of Substances Is Capable of Forming a Buffer

question 30

Multiple Choice

Which pair of substances is capable of forming a buffer in aqueous solution?

• A) H₃PO₄, Na₃PO₃
• B) HNO₃, NaNO₃
• C) HCl, NaCl
• D) H₂CO₃, NaNO₂
• E) CH₃COOH, CH₃COONa

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Definitions:

Classical Conditioning

A conditioning process where two stimuli are systematically paired; the response, at first provoked by the second stimulus, is gradually elicited by the first stimulus alone.

Conditioned Stimulus

In classical conditioning, a previously neutral stimulus that, after association with an unconditioned stimulus, comes to trigger a conditioned response.

Classical Conditioning

A learning process that occurs when two stimuli are repeatedly paired: a response that is initially elicited by the second stimulus is eventually elicited by the first stimulus alone.

Conditioned Response

A learned reaction to a previously neutral stimulus that has become associated with an unconditioned stimulus after conditioning.