18.3 Self-Ionization of Water (Kw) (Video)

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This project was preformed to supply Libretext authors with videos on General Chemistry topics which can be used to enhance their projects. Also, these videos are meant to act as a learning resource for all General Chemistry students.

Video Topics

This video discusses how water is involved in acid and base equilibria. Also, the equilibrium for the self-ionization of water (K_w)

Substances (H₂O) that can act as an acid or base are called amphiprotic

In all Acid/Base reactions water is present.

Because water is amphiprotic it an break up into hydronium and hydroxide ions.

Self-ionization:

K_w = {H₃O⁺}{^-OH} = 1.0 x 10^-14 @ 25^O C

K_w = ion product of water.

In pure water

{H₃O⁺} = {^-OH} = 1.0 x 10^-7 M

This is the requirement of neutrality.

H₃O⁺ and ^-OH are always in Eq. with each other.

Link to Video

Self-Ionization of Water (Kw): https://youtu.be/RMpO0rqUnFg

Attribution

Prof. Steven Farmer (Sonoma State University)

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