A Buffer Solution Is Made Such That the Initial Concentrations $\times$

question 133

Multiple Choice

A buffer solution is made such that the initial concentrations of lactic acid (HC₃H₅O₃) and the lactate ion (C₃H₅O₃^-) are 0.600 M and 0.620 M,respectively.What is the resulting pH if 100.0 mL of 0.100 M potassium hydroxide is added to 0.500 L of the buffer solution? (The K_a of HC₃H₅O₃ is 1.4 $\times$ 10^-4.)

• A)3.81
• B)3.90
• C)2.75
• D)4.96
• E)3.85

Understand the role and impact of written communication in conveying specific details and facilitating decision-making.

Understand the concept of emotional regulation and its development alongside cognitive maturation.

Recognize the importance of intrinsic motivation in early childhood development, particularly in relation to academic skills and creativity.

Identify societal and personal factors influencing children's play preferences, including gender and social status.

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Definitions:

Annual Cash Flows

The net amount of cash and cash-equivalents being transferred into and out of a business over a year.

Investment Costing

The process of determining the total costs associated with making an investment.

Direct Materials

Raw materials that can be directly traced to the manufacturing of a specific product.

Variable Manufacturing Overhead

Costs of manufacturing that vary directly with the level of production, such as raw materials or labor costs.