A Solution of NaF Is Added Dropwise to a Solution

question 30

Multiple Choice

A solution of NaF is added dropwise to a solution that is 0.0144 M in Ba²⁺. When the concentration of F^- exceeds __________ M, BaF₂ will precipitate. Neglect volume changes. For BaF₂, K_sp = 1.7 × 10^-6.

• A)5.9 × 10^-5
• B)1.1 × 10^-2
• C)2.4 × 10^-8
• D)2.7 × 10^-3
• E)1.2 × 10^-4

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Definitions:

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CPAP

Continuous Positive Airway Pressure, a treatment often used for individuals with obstructive sleep apnea that uses mild air pressure to keep the airways open during sleep.

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A condition characterized by having more body weight than what is considered healthy for a certain height, often measured by body mass index (BMI).