In the Titration of a Weak Acid,HA,with a Sodium Hydroxide

question 13

Multiple Choice

In the titration of a weak acid,HA,with a sodium hydroxide solution of approximately the same concentration,the stoichiometric point occurs at pH = 9.5.Which of the following weak acid indicators would be best suited to mark the endpoint of this titration?

• A)indicator A,K_a = 10^-11
• B)indicator B,K_a = 10^-13
• C)indicator C,K_a = 10^-9
• D)indicator D,K_a = 10^-7
• E)indicator E,K_a = 10^-5

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Definitions:

Chunking

A memory strategy involving organizing or grouping separate pieces of information into a single unit, making it easier to remember.

Implicit Memory

A type of long-term memory that enables people to perform tasks without conscious awareness of the previous experiences influencing those actions.

Context-Dependent Memory

The phenomenon where people recall information better when the recall situation is similar to the encoding situation.

Episodic Memory

A form of enduring memory that deals with remembering particular incidents, circumstances, and personal encounters.