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

question 56

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 CO ₃ ²⁻ and 0.1 M HCO ₃ ⁻
• B)0.1 M CO ₃ ²⁻ and 0.9 M HCO ₃ ⁻
• C)0.5 M CO ₃ ²⁻ and 0.5 M HCO ₃ ⁻
• D)0.1 M CO ₃ ²⁻ and 0.1 M HCO ₃ ⁻
• E)They all have the same buffer capacity.

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