A Solution Is Prepared by Dissolving 20

question 94

Multiple Choice

A solution is prepared by dissolving 20.0 g of K₂HPO₄ and 25.0 g of KH₂PO₄ in enough water to produce 1.0 L of solution. What is the pH of this buffer? For phosphoric acid (H₃PO₄) , K_a2 = 6.2 × 10⁻⁸.

• A)7.70
• B)7.42
• C)7.21
• D)7.00
• E)6.72

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Definitions:

Capital

Financial assets or the financial value of assets, such as cash and goods, used by a business to produce goods or services and achieve its objectives.

Marginal Product

The additional output that is produced by adding one more unit of a specific input, like labor.

Wage Rate

The standard amount of pay given for work performed, typically expressed as an amount per hour or per task completed.

Total Product

The total quantity of output produced by a firm with a given amount of input.