550 ML of a 0

question 28

Multiple Choice

550. mL of a 0.40M solution of NaOH is titrated with 0.25 M HCl. Calculate the pH of the solution after 650. mL of the HCl has been added.

• A) 12.48
• B) 12.68
• C) 12.88
• D) 13.08
• E) None of the above

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Definitions:

Sample Proportion

The ratio of members in a sample exhibiting a particular attribute to the total sample size, often expressed as a percentage.

Standard Deviation

An indicator of the degree of spread or divergence from the average in a collection of data, showing the extent to which the data points vary from their average value.

Sample Mean

The average value of the observations in a sample, used as an estimate of the population mean, calculated by summing all observations and dividing by the number of observations.

Normal Curve

A symmetric, bell-shaped curve that represents the distribution of many types of data; most scores are near the average, and frequencies decrease as you move away from the center.