Formic Acid Is Used in the Venom of Some Species

question 45

Multiple Choice

Formic acid is used in the venom of some species of ants. What is the pH of a 0.2 M solution of formic acid (K_a = 1.78 × 10^-4 M) ?

• A) 8.90
• B) 4.45
• C) 3.75
• D) 2.2 Ionization of Water, Weak Acids, and Weak Bases2
• E) 1.72

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Definitions:

Directional

In statistics, directional indicates that a hypothesis specifies the direction of an expected difference or relationship.

Alternative Hypothesis

In statistical testing, the hypothesis that proposes there is a statistically significant relationship or difference between two variables, as opposed to the null hypothesis.

Standard Deviations

A measure that quantifies the amount of variation or dispersion of a set of data values from the mean.

Standard Error

The standard deviation of the sample mean distribution, often used to estimate the accuracy of the sample mean compared to the population mean.