'Hco3 ions' diaporamas de présentation

Groundwater and karst topography

Groundwater and karst topography. #1 factor in geoenvironmental problems of the Nittany Valley. Karst topography: dissolution of limestone along fractures. CO 2 + H 2 O = H 2 CO 3 (acid) H 2 CO 3 + CaCO 3 = Ca 2+ + 2 HCO 3 -

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Prentice Hall Chemistry (c) 2005

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Respiratory System

Respiratory System. Chapter 42. Respiration. Respiration: the exchange of gases (O 2 and CO 2 ) between the external environment and the cell or body of an organism Occurs mainly by diffusion (due to concentration gradients) Thus, requires large surface areas and thin, moist membranes.

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