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

question 103

Multiple Choice

What is the approximate pH at the equivalence point of a weak acid-strong base titration if 25 mL of aqueous formic acid (HCOOH) requires 29.80 mL of 0.3567 mol L^-1 NaOH? K_a =1.8 × 10^-4 for formic acid.

• A)2.06
• B)5.48
• C)8.52
• D)11.94

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Definitions:

Racemic

Referring to a mixture of equal amounts of two enantiomers of a chiral molecule.

Hydride Shift

A rearrangement reaction where a hydride ion (H-) moves from one carbon atom to another within a molecule, often observed in carbocation rearrangements.

Iodobutane

An organic compound with the formula C4H9I, characterized as a butane molecule where one hydrogen atom has been replaced by an iodine atom.

Methanol

Methanol, a straightforward alcohol bearing the formula CH3OH, serves multiple purposes such as a solvent, antifreeze, fuel, and a foundational material for producing other chemicals.