What Is the PH of a Buffer That Results When

question 27

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 × 10^-4)

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

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Definitions:

Overapplied

A situation where the allocated manufacturing overhead costs exceed the actual manufacturing overhead costs incurred.

Denominator Activity

The total base activity used to allocate overhead costs in cost accounting, such as total direct labor hours or machine hours available.

Direct Labor-Hours

The total hours worked by employees directly involved in the manufacturing process, used in allocating manufacturing overhead.

Overapplied

A condition where the manufacturing overhead allocated to products exceeds the actual manufacturing overhead costs incurred.