A Buffer Is Prepared by Adding 300

question 109

Multiple Choice

A buffer is prepared by adding 300.0 mL of 2.0 M NaOH to 500.0 mL of 2.0 M CH₃COOH. What is the pH of this buffer? [K_a(CH₃COOH) = 1.8 × 10^-5]

• A) 4.57
• B) 4.52
• C) 4.87
• D) 4.92
• E) 4.97

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Definitions:

Electron Microscope

A type of microscope that uses a beam of electrons to create an image of the specimen, allowing for much higher resolution than light microscopes.

Light Microscope

An optical instrument using visible light and lenses to magnify small objects, allowing for the observation of cellular structures.

Fluorescent

Exhibiting fluorescence; the ability to absorb light at one wavelength and emit it at a longer wavelength, producing a distinct glow.

Central Vacuoles

Large vesicles found in plant cells that store nutrients and waste products and contribute to cell growth by absorbing water and increasing in size.