Buffers

question 67

Multiple Choice

Buffers

• A)contain salts of weak acids or weak bases.
• B)release hydrogen ions when a base is added to the solution.
• C)keep hydrogen ion concentration and pH within a narrow range.
• D)include phosphate,protein,and bicarbonate systems.
• E)All of these are correct statements.

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Definitions:

Probability

A measure of the likelihood that an event will occur, expressed as a number between 0 and 1.

Stratified Random Sample

A sampling method that divides the population into strata, or subgroups, and selects random samples from each stratum to ensure representation.

Statistic

A numerical measurement describing some characteristic of a sample, used to infer properties of the population from which it was drawn.

Parameter

A quantity that defines certain characteristics of a system or function, often used in mathematical or statistical models.