A PH 488 Buffer Was Prepared by Dissolving 0

question 78

Multiple Choice

A pH 4.88 buffer was prepared by dissolving 0.10 mol of benzoic acid (Ka = 6.3 × 10^-5) and 0.50 mol of sodium benzoate in sufficient pure water to form a 1.00 L solution. To a 70.0 mL aliquot of this solution was added 2.00 mL of 2.00 M HI solution. What was the pH of the new 72.0 mL solution?

• A) 2.84
• B) 3.16
• C) 3.36
• D) 4.65
• E) 4.90

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Definitions:

Withdrawal

The act of removing oneself from a particular situation or environment, often as a coping mechanism to avoid stress or conflict.

Progression

The act of moving forward or advancing towards a goal, or the sequential development of events, ideas, or tasks.

Predictors

Variables or factors that are used to forecast or anticipate future events, outcomes, or behaviors.

Turnover

The pace at which employees are leaving a company and new individuals are employed in their stead.