What Is the PH of a Solution Prepared by Mixing

question 31

Multiple Choice

What is the pH of a solution prepared by mixing 50.00 mL of 0.10 M NH₃ with 10.00 mL of 0.10 M NH₄Cl? Assume that the volume of the solutions are additive and that K_b = 1.8 × 10^-5 for NH₃.

• A) 8.56
• B) 9.28
• C) 9.95
• D) 11.13

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Definitions:

K

The elemental symbol for potassium, a metal that is essential for life and is used in a wide variety of industrial processes.

HA

Hyaluronic Acid, a substance naturally present in the human body and used in cosmetic products for its hydrating properties and in medicine for treating joint disorders.

K

Potassium, an essential dietary mineral and a major electrolyte in the body, key for muscle function and nerve transmission.