The Hydrogen Ion Concentration of a 0

question 148

Multiple Choice

The hydrogen ion concentration of a 0.0010 M solution of hypochlorous acid ( K _a = 3.0×10 ^{- 8}) is:

• A) 1.0×10 ^{- 3} M
• B) 1.0×10 ^{- 11} M
• C) 1.8×10 ^{- 9} M
• D) 5.5×10 ^{- 6} M
• E) none of these

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Definitions:

Earliest Fossils

The oldest known remnants or impressions of ancient organisms preserved in rock.

Own Species

The specific group of organisms to which an individual belongs, identifying it from others in terms of genetics and morphology.

Million Years Ago

A unit of time used in geology and paleontology to denote periods that are millions of years in the past from the present day.

Stromatolites

Layered bio-chemical structures formed in shallow water by the trapping, binding, and cementation of sedimentary grains by microorganisms, mainly cyanobacteria.