Two Buffer Solutions Are Prepared Using Acetic Acid and Sodium

question 110

Multiple Choice

Two buffer solutions are prepared using acetic acid and sodium acetate. Solution A contains 20.0 g of acetic acid (CH₃COOH) and 5.0 g of sodium acetate CH₃COONa) . Solution B contains 10.0 g of acetic acid and 25.0 g of sodium acetate. What is the difference between the pH values of these two solutions? For acetic acid, K_a = 1.8 × 10^-5.

• A) 0.0
• B) 1.0
• C) 2.0
• D) 2.3
• E) 4.6

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Definitions:

Carbon Fixation

Carbon fixation is the process by which inorganic carbon (typically carbon dioxide) is converted into organic compounds by living organisms, notably in photosynthesis.

Mesophyll Cells

Photosynthetic cells located in the interior of leaves, between the upper and lower epidermis, responsible for the production of plant's food through photosynthesis.

Bundle Sheath Cells

Specialized cells in plant leaves surrounding the vascular bundles, notably in C4 plants, playing a critical role in photosynthesis and carbon fixation.

C4 Pathway

The C4 pathway is a photosynthetic process in some plants that captures carbon dioxide more efficiently in hot, dry climates, enhancing their ability to fix carbon.