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

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Definitions:

Range

The gap between the maximum and minimum numbers within a dataset.

College Student

An individual who is enrolled in and attending courses at a college or university.

Interquartile Range

A measure of variability, calculated as the difference between the upper and lower quartiles, indicating the spread of the middle 50% of the dataset.

Range

The difference between the highest and lowest values in a dataset, providing a measure of the overall spread.