What Mass of NaF Must Be Added to 50

question 99

Multiple Choice

What mass of NaF must be added to 50.0 mL of a 0.500 M HF solution to achieve a pH of 3.25? For HF, K_a = 7.2 × 10^-4.

• A) 1.3 g
• B) 0.69 g
• C) 6.9 g
• D) 23 g
• E) 1.5 g

---

Definitions:

Market Price

The current price at which an asset or service can be bought or sold in the marketplace.

Retained Earnings

The portion of a business's profits that are kept within the company rather than distributed to shareholders as dividends.

Cumulative Preferred Stock

A type of preferred stock that accumulates unpaid dividends, which must be paid out before any dividends can go to common shareholders.

Partially Participating

Relating to securities or policies that offer limited rights or dividends to the holder, with certain conditions applied.