Calculate the PH of a Solution Prepared by Dissolving 0

question 27

Multiple Choice

Calculate the pH of a solution prepared by dissolving 0.270 mol of formic acid (HCO₂H) and 0.260 mol of sodium formate (NaCO₂H) in water sufficient to yield 1.00 L of solution. The K_a of formic acid is 1.77 × 10^-4.

• A)2.099
• B)10.264
• C)3.736
• D)2.307
• E)3.952

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Definitions:

Wilcoxon Signed Rank Test

A non-parametric test used to compare two related samples, matched samples, or repeated measurements on a single sample to assess whether their population mean ranks differ.

Absolute Difference

The non-negative difference between two values, disregarding the direction of difference.

Matched Pairs Studies

A form of experimental design where each subject is paired with a control subject based on certain characteristics, and differences between pairs are analyzed.

Wilcoxon Signed Rank Test

A non-parametric statistical test used to compare two related samples, matched samples, or repeated measurements on a single sample to assess whether their population mean ranks differ.