An Acetate Buffer Has a PH of 4

question 79

Multiple Choice

An acetate buffer has a pH of 4.40. Which of the following changes will cause the pH to decrease?

• A) dissolving a small amount of solid sodium acetate
• B) adding a small amount of dilute hydrochloric acid
• C) adding a small amount of dilute sodium hydroxide
• D) dissolving a small amount of solid sodium chloride
• E) diluting the buffer solution with water

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Definitions:

Numerator

The top number in a fraction, indicating how many parts of a whole are being considered.

Two-tailed Test

A statistical test in which the critical area for rejection of the null hypothesis is on both sides of the distribution.

Variance

A statistical measurement of the spread between numbers in a data set, indicating how far each number in the set is from the mean.

Significantly Less

A statistical term used to indicate that one set of data is considerably lower than another with a level of statistical significance.