Phosphoric Acid Is a Polyprotic Acid,with PK Values of 2

question 16

Multiple Choice

Phosphoric acid is a polyprotic acid,with pK values of 2.14,6.86,and 12.38.Which ionic form predominates at pH 9.3?

• A)H₃PO₄
• B)H₂PO₄¹⁻
• C)HPO₄²⁻
• D)PO₄³⁻
• E)none of the above

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Definitions:

Mitosis

A type of cell division in eukaryotic cells that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus.

Telomerase

An enzyme that adds nucleotide sequences to the ends of chromosomes, thereby preventing their shortening during cell division.

Malignant Cells

Abnormal cells that divide uncontrollably and have the potential to invade other tissues, leading to cancer.

Neoplasm

An abnormal growth of tissue, which can be benign or malignant, resulting from uncontrolled cell division.