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Unformatted text preview: n pure water, one water mo lecule donates a proton to another water molecule to produce ions. ®
H 2 O + H 2 O ¬¾ H 3 O + + OH ¾¾
Base Acid é Proton ù
êë acceptor úû Acid é Proton ù
êë donor úû é Proton ù
r Ba e s é Proton ù
êë acce tor úû
p · In pure water, the transfer of protons between water mo lecules produces equal + –
numbers of H3O and OH ions. However, the number of ions produced in pure water is very small, as indicated below: Pure water +
[H3O ] = [OH ] = 1.0 x 10 7 M + –
· When the concentrations of H3O and OH are multiplied together, the ion product constant (Kw) is formed. +
– Kw = [H3O ] x [OH ] –
= (1.0 x 10 7 M) x (1.0 x 10 7 M) = 1.0 x 10 14
· All aqueous solut ions have H3O and OH i...
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