A Popular Buffer Solution Consists of Carbonate (CO₃²¯) and Hydrogen

question 71

Multiple Choice

A popular buffer solution consists of carbonate (CO₃²¯) and hydrogen carbonate (HCO₃¯) conjugate acid-base pair. Which, if any, of the following such buffers has the highest buffer capacity?

• A) 0.9 M CO₃²¯ and 0.1 M HCO₃¯
• B) 0.1 M CO₃²¯ and 0.9 M HCO₃¯
• C) 0.5 M CO₃²¯ and 0.5 M HCO₃¯
• D) 0.1 M CO₃²¯ and 0.1 M HCO₃¯
• E) They all have the same buffer capacity.

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Definitions:

Egocentric Thought

a cognitive perspective where an individual perceives the world solely from their own point of view, often seen in early childhood development.

Conservation

In psychological terms, it refers to a child's ability to recognize that the quantity of a substance remains the same despite changes in its shape or container.

Centrated Thinking

A type of thought process in early childhood development where the child focuses on one salient aspect of a situation, neglecting other important factors.

Postformal Thought

A stage of cognitive development proposed beyond Piaget's formal operational stage, characterized by the understanding that answers to questions can vary depending on circumstances and personal perspectives.