Determine the PH of a 0

question 142

Multiple Choice

Determine the pH of a 0.188 mol L^-1 NH₃ solution at 25 °C. The K_b of NH₃ is 1.76 × 10^-5.

• A) 5.480
• B) 2.740
• C) 8.520
• D) 11.260
• E) 12.656

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Definitions:

Confidence Interval

A statistical range, based on sample data, within which a population parameter is estimated to lie with a certain level of confidence.

Number of Successes

In statistical experiments, the count of instances that meet a defined criterion for success.

Standard Error

A measure of the variability or dispersion of a sampling distribution, often used as an estimate of the accuracy of a sample mean.

Plus Four Method

A statistical method that adds four to the sample size and regards two successes and two failures in a binomial proportion confidence interval.