A Solution Is Prepared by Dissolving 0

question 91

Multiple Choice

A solution is prepared by dissolving 0.23 mol of benzoic acid and 0.27 mol of sodium benzoate in water sufficient to yield 1.00 L of solution.The addition of 0.05 mol of NaOH to this buffer solution causes the pH to increase slightly. The pH does not increase drastically because the NaOH reacts with the ________ present in the buffer solution. The K_a of benzoic acid is 6.3 × 10^-5.

• A)H₂O
• B)H₃O⁺
• C)benzoate
• D)benzoic acid
• E)This is a buffer solution: the pH does not change upon addition of acid or base.

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Definitions:

Indirect Materials

Materials used in the production process that cannot be directly linked to a specific product, such as lubricants and cleaning supplies used in machinery.

Factory Overhead

All indirect costs associated with manufacturing, excluding direct materials and direct labor, such as utilities, depreciation, and maintenance of factory equipment.

Direct Labor Costs

The wages of employees who are directly involved in the production of goods or services.

Debit Balance

An accounting term describing a balance where total debits exceed total credits in an account.