Hydrofluoric Acid Is Used in the Preparation of Numerous Pharmaceuticals

question 16

Multiple Choice

Hydrofluoric acid is used in the preparation of numerous pharmaceuticals (e.g., Prozac) and industrial materials (e.g., Teflon) . It can be produced by the reaction of hydrogen and fluorine gases. Starting with initial concentrations of 2.00 M for H₂ and 2.00 M for F₂, what would be the equilibrium concentration of HF? The equilibrium constant for the reaction K_c = 115.

• A) 0.85 M
• B) 1.69 M
• C) 2.85 M
• D) 3.37 M
• E) 4.00 M

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Definitions:

Melanocytes

Cells located in the bottom layer of the skin's epidermis and in the eye, responsible for producing melanin, the pigment that gives skin its color.

Keratinocytes

The predominant cell type in the epidermis, responsible for the production of keratin, a protein that helps protect the skin from environmental damage.

Melanosomes

Organelles within cells that synthesize, store, and transport melanin, the pigment responsible for skin, hair, and eye color.

Dermal

Pertaining to the skin, particularly its deeper layer known as the dermis which contains nerve endings, glands, and vessels.