How Many Moles of Solid NaF Would Have to Be

question 72

Multiple Choice

How many moles of solid NaF would have to be added to 1.0 L of 2.16 M HF solution to achieve a buffer of pH 3.35? Assume there is no volume change.(K_a for HF = 7.2 × 10^-4)

• A) 3.5
• B) 0.45
• C) 0.75
• D) 1.0
• E) 1.6

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Definitions:

Leydig Cells

Cells located within the testes that produce testosterone in response to luteinizing hormone.

Androgens

Androgens are a group of steroid hormones that play a key role in male traits and reproductive activity, present in both males and females.

Testes

The male reproductive glands where sperm and male sex hormones (such as testosterone) are produced.

Cryptorchidism

A condition where one or both of the testes fail to descend from the abdomen into the scrotum before birth.