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Base (chemistry)

In chemistry, a base (or "alkali") is a compound that is the opposite of an acid in the sense that it has a pH above 7 (whereas an acid has a pH below 7), and a base will neutralize an acid. See Acid-base reaction theories.

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Nitronium ion

... HSO4- + NO2+ + H2O The nitronium ion also exists in the solid form of the nitrogen oxide N2O5, which is an ionic solid formed from nitronium and nitrate ions. Its ...