A Buffer Solution Is Made Such That the Initial Concentrations

question 111

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 *10^-4.)

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

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Definitions:

Epinephrine

A hormone and medication, also known as adrenaline, used to treat allergic reactions and cardiac arrest among other conditions.

Phagocytosis

Ingestion and digestion of bacteria and particles by phagocytes.

Immune Response

The body's defensive reaction to foreign substances or pathogens, involving recognition, response, and memory.

Neutrophils

A type of white blood cell, part of the immune system, that helps fight infection by engulfing and killing pathogens.