Buffer Solutions with the Component Concentrations Shown Below Were Prepared

question 49

Multiple Choice

Buffer solutions with the component concentrations shown below were prepared. Which of them should have the highest pH?

• A) [H₂PO₄^-] = 0.50 M, [HPO₄^2-] = 0.50 M
• B) [H₂PO₄^-] = 1.0 M, [HPO₄^2-] = 1.0 M
• C) [H₂PO₄^-] = 1.0 M, [HPO₄^2-] = 0.50 M
• D) [H₂PO₄^-] = 0.50 M, [HPO₄^2-] = 1.0 M
• E) [H₂PO₄^-] = 0.75 M, [HPO₄^2-] = 1.0 M

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Definitions:

Rugae

Folds, such as those in the lining of the stomach.

Gastric Juices

are a mixture of mucus, hydrochloric acid, and digestive enzymes produced by the stomach lining to digest food.

Stomach

Muscular region of the vertebrate digestive tract, extending from the esophagus to the small intestine.

Suspension Feeders

Organisms that feed by filtering suspended matter and food particles from water, often found in aquatic environments.