The Dissociation Constant for an Acid with a PK_a Value

question 78

Multiple Choice

The dissociation constant for an acid with a pK_a value of 6.0 is

• A) 1 × 10 ^{− 6}
• B) − 1 × 10⁶
• C) 1 × 10⁶
• D) − 1 × 10 ^{− 6}

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Definitions:

Buffers

Substances that minimize changes in pH by absorbing or releasing hydrogen ions, thus maintaining a stable environment in solutions, especially in biological systems.

Hydrogen Bonds

Weak bonds between partially positive hydrogen atoms and partially negative atoms (like oxygen or nitrogen) in different molecules or within the same molecule.

pH Solution

A measure of the acidity or alkalinity of a solution, on a scale of 0 to 14, where 7 is neutral, values below 7 are acidic, and values above 7 are alkaline.

Ions

Atoms or molecules with a net electric charge due to the loss or gain of one or more electrons.