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

question 209

Multiple Choice

A buffer solution is made such that the initial concentrations of lactic acid (HC₃H₅O₃) and the lactate ion (C₃H₅O₃^-) are both 0.600 M.What is the resulting pH if 10.0 mL of 1.00 M hydrochloric acid is added to 0.500 L of the buffer solution? (The K_a of HC₃H₅O₃ is 1.4 $\times$ 10^-4.)

• A)3.82
• B)3.88
• C)2.92
• D)4.79
• E)3.85

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Definitions:

Synapse

The junction between two neurons or between a neuron and a muscle where transmission of electric or chemical signals occurs.

Ganglia

Structures containing nerve cell bodies, typically located outside of the central nervous system, which relay impulses between neurons.

Celiac Ganglion

A cluster of nerve cells located in the abdomen, part of the sympathetic nervous system, that helps control the digestive system.

Ganglia

Structures containing a collection of nerve cell bodies, typically located outside the central nervous system, that process and relay neuronal signals.