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:

Bank

A financial institution licensed to receive deposits and make loans, and offer other financial services, such as wealth management and currency exchange.

Float Balance

The amount of money within a financial system that is briefly counted twice due to time gaps in registering a deposit or withdrawal, often seen in the banking system.

Ledger Balance

The balance of a bank account at the start of each day, including all deposits and withdrawals that have been posted to the account.

Miller-Orr Model

A model used to manage cash balances by setting upper and lower limits on cash reserves, triggering transfers to optimize interest and liquidity.