Which Solution Containing an Equal Number of Moles of Each

question 56

Multiple Choice

Which solution containing an equal number of moles of each of the substances is a buffer?

• A)HCl and NaCl
• B)HNO₂ and HNO₃
• C)CH₃COOH and NaCH₃COO
• D)H₂CO₃ and CO₃^2-
• E)More than one of the solutions above is a buffer.

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Definitions:

Two Groups

A research design involving comparison between two separate groups of participants to determine the effect of a variable.

Experiment

A scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.

History Effect

refers to the impact that events occurring between the first and second measurements in an experiment have on the subjects' performance, independent of the experimental manipulation.

Regression Toward the Mean

A statistical phenomenon where extreme scores on a variable tend to be closer to the mean upon subsequent measurements.