Which of the Following Weak Acids Would Make the Best

question 17

Multiple Choice

Which of the following weak acids would make the best buffer at pH = 5.0?

• A)acetic acid (K_a = 1.74 × 10-5,pK_a = 4.76)
• B)bicarbonate (K_a = 6.3 × 10-11,pK_a = 10.24)
• C)tris-hydroxymethyl aminomethane (K_a = 8.32 × 10-9,pK_a = 8.07)
• D)lactic acid (K_a = 1.38 × 10-4,pK_a = 3.86)

---

Definitions:

Smoke

The visible result of combustion, consisting of particulate matter, gases, and water vapor released into the air.

Confidence Interval

A range of values derived from sample data that is likely to cover the true value of an unknown population parameter, expressed at a given confidence level (e.g., 95%).

High Blood Pressure

A medical condition where the blood pressure in the arteries is persistently elevated, which can lead to serious health issues if not managed properly.

Margin of Error

An expression of the amount of random sampling error in a survey's results, which describes how closely the sample estimate matches the true value in the whole population.