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

question 164

Multiple Choice

What is the approximate pH at the equivalence point of a weak acid-strong base titration if 50.00 mL of aqueous hydrofluoric acid requires 60.00 mL of 0.200 M LiOH to reach the equivalence point? K_a = 6.76 × 10^-4 for HF.

• A) 1.89
• B) 5.90
• C) 8.10
• D) 12.10

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Definitions:

Infinite Population

A theoretical concept where the population size is considered to be limitless for the purposes of statistical analysis.

Standard Deviation

A statistical measurement that quantifies the amount of variation or dispersion of a set of values.

Atomic Orbitals

Mathematical functions that describe the wave-like behavior of an electron in an atom, these orbitals determine the distribution of electrons around an atom’s nucleus.

Hybrid Atomic Orbitals

Orbitals formed by the combination of standard atomic orbitals within an atom, explaining the bonding and geometry of molecules more accurately than unhybridized orbitals.