What Is the Hydroxide-Ion Concentration of an Aqueous Solution Having

question 126

Multiple Choice

What is the hydroxide-ion concentration of an aqueous solution having a pH of 4.72?

• A) 4.72 × 10^-5 mol/L
• B) 1.91 × 10^-14 mol/L
• C) 5.25 × 10^-10 mol/L
• D) 1.91 × 10^-5 mol/L

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Definitions:

Tetrapods

A superclass of animals characterized by four limbs (or the descent from such), including amphibians, reptiles, birds, and mammals.

Extant Species

Refers to species that are currently living and have not gone extinct.

Eusthenopteron

An extinct genus of lobe-finned fish, considered an important precursor to early tetrapods and amphibians.

Acanthostega

An extinct amphibian from the late Devonian period, known as an early tetrapod linking fish to terrestrial vertebrates.