A Buffer Is Prepared by Combining 25 ML of 0

question 18

Multiple Choice

A buffer is prepared by combining 25 mL of 0.50 M NH₃(aq) with 25 mL of 0.20 M HCl.What is the pH of the buffer? (K_a (NH₄⁺) = 5.6 × 10−¹⁰)

• A) 7.76
• B) 8.00
• C) 8.86
• D) 9.43
• E) 9.65

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Definitions:

Wave Scheduling

A scheduling system where patients are scheduled in groups at the top of the hour, allowing for flexibility in appointments.

Open-hours Scheduling

A healthcare appointment system that allows patients to visit without a prior appointment during specified hours.

First-come

A policy or principle that serves individuals or addresses tasks in the order that they arrive or are received.

First-served

A principle or policy where services are provided in the order that requests or individuals arrive.