If 500 ML of 1

question 91

Multiple Choice

If 50.0 mL of 1.2 × 10^{-3 M} Pb(NO₃) ₂ are added to 50.0 mL of 2.0 × 10^{-4 M} Na₂S, what takes place?

• A) A precipitate of PbS forms.
• B) A precipitate of NaNO₃ forms.
• C) A precipitate of Na₂S forms.
• D) A precipitate of Pb(NO₃)₂ forms.
• E) No precipitate forms.

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Definitions:

Associative Learning

A learning process by which a connection or association is made between two stimuli or between a behavior and a stimulus.

Psychologist

A professional specializing in the study of the mind and behavior, often providing therapy and counseling services.

Classical Conditioning

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

UCS

An acronym standing for Unconditioned Stimulus, a stimulus that naturally and automatically triggers a response without needing to be learned.