What Is the PH of a Buffer Solution That Is $K _ { a }$

question 31

Multiple Choice

What is the pH of a buffer solution that is 0.251 mol L^-1 in lactic acid and 0.151 mol L^-1 in sodium lactate? The $K _ { a }$ of lactic acid is 1.4 × $10 ^ { - 4 }$ .

• A)12.58
• B)5.28
• C)4.08
• D)10.37
• E)3.63

---

Definitions:

ANOVA F Statistic

A statistic used in Analysis of Variance (ANOVA) tests to determine if there are significant differences between the means of three or more groups.

Significance Level

A threshold chosen by the researcher which the p-value must be below in order to reject the null hypothesis.

Explanatory Variables

Variables in a statistical model that are used to predict or explain changes in the dependent variable.

Deaths

The occurrence of the permanent cessation of all vital functions in a living organism, marking the end of life.