Which Statement About Buffers Is TRUE

question 2

Multiple Choice

Which statement about buffers is TRUE?

• A) A buffer composed of a weak acid of pK_a = 5 is stronger at pH 4 than at pH 6.
• B) At pH values lower than the pK_a, the salt concentration is higher than that of the acid.
• C) The pH of a buffered solution remains constant no matter how much acid or base is added to the solution.
• D) The strongest buffers are those composed of strong acids and strong bases.
• E) When pH = pK_a, the weak acid and salt concentrations in a buffer are equal.

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Definitions:

Defective Items

Products that fail to meet quality standards or specifications and are therefore unsuitable for their intended use.

Poisson Distribution

The Poisson distribution is a probability distribution that expresses the probability of a given number of events occurring in a fixed interval of time or space if these events happen with a known constant rate and independently of the time since the last event.

Variance

A measure of the dispersion or spread of a set of data points around their mean value, quantifying how much the data points differ from the average.

Poisson Problem

A statistical problem that deals with counting the number of events that occur randomly over a fixed period or in a fixed space, assuming that these events happen with a known constant mean rate and independently of the time since the last event.