A Popular Buffer Solution Consists of Carbonate (CO₃^2-) and Hydrogen

question 74

Multiple Choice

A popular buffer solution consists of carbonate (CO₃^2-) 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 CO₃^2- and 0.1 M HCO₃^-
• B) 0.1 M CO₃^2- and 0.9 M HCO₃^-
• C) 0.5 M CO₃^2- and 0.5 M HCO₃^-
• D) 0.1 M CO₃^2- and 0.1 M HCO₃^-
• E) They all have the same buffer capacity.

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Definitions:

Circular Elements

Components or parts of a design characterized by their round shape, important in various engineering and architectural constructs.

Circular Runout

A geometric dimensioning and tolerancing (GD&T) term that refers to the variation of a feature's surface as it is rotated around a datum axis.

Total Runout

The maximum allowable variation in the shape and location of a feature when measured around the entire surface.

Tolerance

The permissible limit or variation in dimensions, typically expressed in plus or minus values, indicating how much deviation from a standard is acceptable.