Product of concentration of H+ ions with the concentration of OH- ions must be 10^-14

  • Thread starter PainterGuy
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  • #1
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hello everyone,

i read it somewhere:--

In such a solution at 25C, the product of concentration of H+ ions with the concentration of OH- ions must be 10^-14. In an acid solution, by forcing a high concentration of H+ ions, you necessarily suppress the concentration of OH- ions.

what is this saying? how do one get 10^-14?

i am grateful for any help you can give me. many thanks.

cheers
 

Answers and Replies

  • #2
Borek
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what is this saying? how do one get 10^-14?
10-14 is a value of an equilibrium constant of the water autodissociation:

H2O <-> H+ + OH-

and its value is determined experimentally.

See also water ion product.
 

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