What Is the PH of a Buffer That Results When $\times$

question 32

Multiple Choice

What is the pH of a buffer that results when 0.40 mol NaHCO₂ is mixed with 100.0 mL of 2.00 M HCl(aq) and diluted with water to 250 mL? (K_a of HCO₂H = 1.8 $\times$ 10^-4)

• A) (-0.301)
• B) 3.05
• C) 3.44
• D) 3.74
• E) 4.05

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Definitions:

Variable Overhead Rate Variance

The difference between the actual variable overhead incurred and the expected (or standard) variable overhead based on activity levels.

Favorable

A term used in accounting and finance to describe outcomes or variances that are better than anticipated, indicating a positive performance against the budget or forecast.

Unfavorable

A term used to describe a variance or outcome that results in a worse financial position than expected or budgeted.

Labor Rate Variance

The difference between the actual labor costs incurred and the expected (or standard) labor costs, often due to paying a higher or lower wage rate than planned.