Which Pair of Substances Could Form a Buffered Aqueous Solution

question 13

Multiple Choice

Which pair of substances could form a buffered aqueous solution?

• A) HCl, NaCl
• B) HNO₃, NaNO₃
• C) H₃PO₄, NaH₂PO₄
• D) H₂SO₄, CH₃COOH
• E) NH₃, NaOH

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Definitions:

Direct Control

The management or regulation of variables in an experiment to ensure that any observed effects are due to the manipulation of the independent variable.

Extraneous Variables

Variables that are not the focus of a study but could influence the results, potentially leading to confounding effects if not controlled.

Randomization

The process of randomly assigning subjects to different groups in a study, minimizing biases and ensuring variability.

Dependent Variable

The outcome factor that researchers measure in an experiment to see if it changes in response to manipulations of the independent variable.