What Is the PH of an Aqueous Solution Prepared by Mixing

question 10

Multiple Choice

What is the pH of an aqueous solution prepared by mixing 50.00 mL of 0.10 mol L^-1 NH₃ with 5.00 mL of 0.10 mol L^-1 NH₄Cl?
Assume that the volume of the solutions are additive and that K_b = 1.8 × 10^-5 for NH₃.

• A)8.25
• B)9.28
• C)10.26
• D)11.13

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Definitions:

Standard deviation

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

Population standard deviation

A measure of the dispersion of a set of data from its mean, calculated for the entire population.

Confidence interval

A range of values, derived from the sample statistics, that is likely to contain the value of an unknown population parameter.

Confidence interval

An estimated range of values calculated from sample data that is likely to include the true population parameter with a specified level of confidence.