You Need to Prepare a Buffer Solution with a PH

question 99

Multiple Choice

You need to prepare a buffer solution with a pH of 4.00, using NaF and HF. What ratio of the ratio of [base]/[acid] should be used in making the buffer? For HF, K_a = 7.2 × 10^{- 4}.

• A) [base]/[acid] = 0.14
• B) [base]/[acid] = 0.42
• C) [base]/[acid] = 2.36
• D) [base]/[acid] = 7.20
• E) None of the above ratios is correct.

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Definitions:

Artificial Selection

The process by which humans breed plants and animals for particular genetic traits, often leading to dramatic changes in morphology, physiology, and behavior over relatively short time periods.

Brassica Oleracea

A species of plant that includes a variety of vegetables, such as cabbage, broccoli, cauliflower, kale, and Brussels sprouts, due to selective breeding.

Plant Organ

A specialized part of a plant, such as roots, stems, leaves, or flowers, that performs a particular function necessary for the plant's life.

Gall Sizes

Variations in the size of plant galls, which are growths induced by organisms like insects as a habitat and food source.