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:

Factor

A number or algebraic expression that divides another number or expression evenly—i.e., without leaving a remainder.

Missing

Something that is lost or absent, especially a piece of information that is not available.

Factoring

The process of breaking down an expression into a product of simpler expressions, often used to simplify expressions or solve equations.

Integers

Whole values including positive, negative, and zero without any fractions or decimals fall under the category of integers.