The Following Pictures Represent Solutions That Contain a Weak Acid

question 177

Multiple Choice

The following pictures represent solutions that contain a weak acid HA and/or its potassium salt KA.Unshaded spheres represent H atoms and shaded spheres represent A^- ions.(K⁺,H₃O⁺,OH^-,and solvent H₂O molecules have been omitted for clarity. )
-For which solution(s) is pH = pK_a?

• A)only solution (1)
• B)only solution (2)
• C)only solution (3)
• D)solutions (1)and (3)

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Definitions:

Predetermined Overhead Rate

A rate used to allocate estimated overhead costs to specific products or job orders based on a preselected activity base.

Labor-Hours

The total hours worked by employees, usually in the context of manufacturing or production, that can be used to allocate costs or measure productivity.

Predetermined Overhead Rate

A calculated rate used to apply manufacturing overhead costs to products, based on estimated costs and activity levels before a period begins.

Predetermined Overhead Rate

A rate used to allocate manufacturing overhead to individual products or job orders, based on a set formula prior to the start of a period.