Multiple Choice
When water undergoes auto-ionization, which of the following species are produced?
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17. Acid and Base Equilibrium
Auto-Ionization
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When two water molecules undergo auto-ionization (self-ionization), what are the products formed?
A
H+ and O2-
B
H2O2 and H2
C
H2O and H+
D
H3O+ and OH-
Verified step by step guidance1
Understand that auto-ionization (or self-ionization) of water involves two water molecules interacting to produce ions.
Recall that in this process, one water molecule donates a proton (H+) to another water molecule.
Recognize that the water molecule accepting the proton becomes a hydronium ion, represented as \(\mathrm{H_3O^+}\).
Identify that the water molecule losing the proton becomes a hydroxide ion, represented as \(\mathrm{OH^-}\).
Therefore, the products formed from the auto-ionization of water are \(\mathrm{H_3O^+}\) and \(\mathrm{OH^-}\) ions.
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