What Is the Approximate PH at the Equivalence Point of a Weak

question 72

Multiple Choice

What is the approximate pH at the equivalence point of a weak acid-strong base titration if 25 mL of aqueous hydrofluoric acid requires 30.00 mL of 0. 400 mol L^-1 NaOH? K_a = 6.76 × 10^-4 for HF.

• A) 1.74
• B) 5.75
• C) 8.25
• D) 12.26

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Definitions:

Assembly

The process of putting together various components or pieces to build a finished product.

Predetermined Overhead Rate

A rate calculated before the accounting period begins, used to estimate the cost of manufacturing overhead for a specific activity base.

Machine-Hours

An indicator of the time spent in production, calculating the duration in hours that machinery is active during the manufacturing cycle.

Direct Labor-Hours

The accumulated hours spent by workers directly involved in manufacturing activities.