Consider the Salt Ammonium Fluoride, NH₄F, That Is Derived from a Combination

question 165

Multiple Choice

Consider the salt ammonium fluoride, NH₄F, that is derived from a combination of a weak acid and a weak base as shown below. NH₃ (g) + HF (g) →NH₄F K _b(NH₃) = 1.8×10 ^{- 5} and K _a(HF) = 6.8×10 ^{- 4} Which statement listed below is true?

• A) This salt is neutral when dissolved in water.
• B) This salt is acidic when dissolved in water.
• C) This salt is basic when dissolved in water.
• D) This salt can be either acidic or neutral depending upon its concentration in water.
• E) This salt can be either basic or neutral depending upon its concentration in water.

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Definitions:

Unconditioned Stimulus

In classical conditioning, an unconditioned stimulus is something that naturally and automatically triggers a response without any learning needed, such as food causing salivation in dogs.

Unconditional Statement

A statement or proposition that is true or asserted without any conditions or limitations.

Classical Conditioning

A training approach involving the regular pairing of two cues, where a response originally provoked by the second cue becomes triggered by only the first cue over time.

Instrumental Learning

A learning process that uses rewards and punishments to promote or discourage a behavior, also known as operant conditioning.