What Is the PH of the Buffer That Results When $\times$

question 56

Multiple Choice

What is the pH of the buffer that results when 12.0 g of NaH₂PO₄ and 8.00 g of Na₂HPO₄ are diluted with water to a volume of 0.50 L? (K_a of H₂PO₄^- = 6.2 $\times$ 10^-8,the molar masses of NaH₂PO₄ and Na₂HPO₄ are 120.0 g/mol and 142.0 mol,respectively)

• A) 4.10
• B) 6.96
• C) 7.21
• D) 7.46
• E) 9.90

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Definitions:

Stratified Epithelium

Epithelium consisting of more than one layer of cells.

Multiple Layers

Refers to structures or materials composed of several levels or strata, often used in the context of biological tissues or geological formations.

Changes Shape

Refers to the process wherein an object or material undergoes a modification in form without changing its chemical composition.

Extracellular Matrix

A complex network of proteins and carbohydrates surrounding cells, providing structural and biochemical support.