What Molar Ratio of CH₃COOH to CH₃COONa Should Be Used

question 22

Multiple Choice

What molar ratio of CH₃COOH to CH₃COONa should be used in order to prepare an acetic acid / sodium acetate buffer solution with a pH of 4.00 ± 0.02? [K_a(CH₃COOH) = 1.8 × 10^-5]

• A) 0.18
• B) 0.84
• C) 1.2
• D) 5.6
• E) 0.10

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Definitions:

Amino Acids

Organic compounds that combine to form proteins and serve as the building blocks of life.

Vitamins

Organic compounds that are necessary in small amounts for various bodily functions and must be obtained from the diet since they cannot be synthesized by the body.

Macronutrient

Nutrients required in large amounts by living organisms, including proteins, carbohydrates, and fats.

Chlorophyll

A group of green pigments found in the chloroplasts of plants, algae, and some bacteria that absorb light to provide energy for photosynthesis.