A 500-ML Sample of a 0

question 26

Multiple Choice

A 50.0-mL sample of a 0.100 M solution of a weak acid HA has an equilibrium pH of 4.00. After 1.0 × 10^-3mol of a substance X is added to the solution, it is observed that the pH of the solution increases. What might be true about substance X? I. X might be a strong base that partially neutralized some weak acid.
II) X might be a strong acid that made the solution more acidic.
III) X might be a soluble ionic compound containing the anion A^-.

• A) I only
• B) II only
• C) III only
• D) I or III
• E) II or III

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Definitions:

Increase

A rise or growth in quantity, size, or intensity.

n

In statistical contexts, 'n' typically represents the sample size or number of observations in a dataset.

Sample Size

The number of observations or individuals sampled from a population for the purpose of a study or experiment.

Population Size

The total number of individuals or units in the group that is being studied.