Which One of the Following Is the Weakest Acid

question 127

Multiple Choice

Which one of the following is the weakest acid?

• A)HF (K_a = 6.8 × 10^-4)
• B)HClO (K_a = 3.0 × 10^-8)
• C)HNO₂ (K_a = 4.5 × 10^-4)
• D)HCN (K_a = 4.9 × 10^-10)
• E)Acetic acid (K_a = 1.8 × 10^-5)

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Definitions:

Grana

Stacked membranous structures within chloroplasts that contain chlorophyll, where the light-dependent reactions of photosynthesis occur.

Photosynthesis

A process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.

Oxygen Atoms

Fundamental components of molecules, essential for respiration in organisms and a key element in the Earth's atmosphere.

Proton Gradient

The gradient of hydrogen ions (protons) across a membrane, which is a form of potential energy used for ATP production in cells.