Re: --Water--Duh!--

Water: Both Acid and Base

Water as both H+ and OH- naturally in small and equal concentrations, 1.00 x 10^-7, . Hence pH 7.

Also From http://www.chem1.com/acad/webtext/virtualtextbook.html

http://www.chem1.com/acad/pdf/c1xacid1.pdf page 11

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http://www.chem1.com/acad/webtext/abcon/abcon-images/AB02.jpg

Notice that H2O is shown in two places on this diagram. Near the top it is the conjugate base of

H3O+, while near the bottom it is an acid whose conjugate base is OH¡.

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WIEL