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:

Scarcity

The core issue in economics is the presence of endless human desires within a finite resource environment.

Economy

A system of production, distribution, and consumption of goods and services within a certain geographical area.

Inefficiencies

Instances where resources are not used optimally, resulting in wasted or less productive outcomes.

Scarcity

is the fundamental economic problem of having seemingly unlimited human wants in a world with limited resources.