A Buffer Solution Contains Carbonic Acid (H₂CO₃)and Sodium Bicarbonate (NaHCO₃),each

question 51

Multiple Choice

A buffer solution contains carbonic acid (H₂CO₃) and sodium bicarbonate (NaHCO₃) ,each at a concentration of 0.100 M.The relevant equilibrium is shown below.What is the pH of this buffer solution? H₂CO₃(aq) + H₂O(l) ? H₃O⁺(aq) + HCO₃^?(aq) K_a = 4.5 × 10^?7

• A)4.50
• B)7.00
• C)6.35
• D)7.65
• E)2.16

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Definitions:

Sensitization

An increased response to a stimulus following repeated exposures to it.

Habituation

A psychological process where there is a decrease in response to a stimulus after being repeatedly exposed to it.

Higher-order Conditioning

A process where a conditioned stimulus is paired with a new neutral stimulus, causing the new stimulus to also elicit the conditioned response.

Modeling

A process in social learning theory where individuals learn behaviors, attitudes, or emotional reactions through observing others.