The PH of a 0

question 108

Multiple Choice

The pH of a 0.25 M aqueous solution of hydrofluoric acid,HF,at 25.0 °C is 2.03.What is the value of K_a for HF?

• A)2.0 × 10^-9
• B)1.1 × 10^-9
• C)6.0 × 10^-5
• D)3.5 × 10^-4
• E)none of the above

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Definitions:

Two-tailed Test

A statistical test that allows for the exploration of relationships in both directions, enabling the detection of significant differences regardless of the direction.

Significant

Pertaining to results in statistical analysis, significant means the findings are unlikely to have occurred by chance and indicate a real effect or relationship.

Z-statistic

A statistical measure that quantifies the difference between a sample statistic and its population parameter, measured in units of the standard deviation.

Z-test

A statistical test used to determine whether there is a significant difference between the mean of a sample and the mean of a population, or between the means of two populations.