A Saturated Solution of Calcium Hydroxide, Ca(OH)₂, Is in Contact

question 10

Multiple Choice

A saturated solution of calcium hydroxide, Ca(OH) ₂, is in contact with excess solid Ca(OH) ₂. Which of the following statements correctly describes what will happen when aqueous HCl (a strong acid) is added to this mixture, and system returns to equilibrium? (For Ca(OH) ₂, K_sp = 6.5 × 10⁻⁶)

• A)The solubility of Ca(OH)₂ will be unchanged.
• B)The OH ⁻ concentration will decrease and the Ca ²⁺ concentration will increase.
• C)The OH ⁻ concentration will increase and the Ca ²⁺ concentration will decrease.
• D)The concentrations of both Ca ²⁺ and OH ⁻ will increase.
• E)The solubility of Ca(OH)₂ will decrease.

---

Definitions:

Fixed-interval Schedule

A type of reinforcement schedule in behavioral psychology where rewards are provided after a consistent time period passes.

Variable-interval Schedule

A reinforcement schedule in which rewards are given after an unpredictable time interval, leading to a steady, moderate response rate.

Fixed-ratio Schedule

A type of reinforcement schedule in operant conditioning where a response is reinforced only after a specified number of responses, leading to a high and steady rate of responding.

Classical Conditioning

Classical Conditioning is a learning process that occurs through associations between an environmental stimulus and a naturally occurring stimulus, famously illustrated by Pavlov's dogs experiment.