Editing Acid–base reaction (section)

===Lux–Flood definition===
This acid–base theory was a revival of the oxygen theory of acids and bases proposed by German chemist [[Hermann Lux]]<ref>{{cite journal |last=Franz |first=H. |year=1966 |title=Solubility of Water Vapor in Alkali Borate Melts |journal=[[Journal of the American Ceramic Society]] |volume=49 |issue=9 |pages=473–477 |doi=10.1111/j.1151-2916.1966.tb13302.x}}</ref><ref name="lux">{{cite journal |last=Lux |first=Hermann |author-link=Hermann Lux |year=1939 |title="Säuren" und "Basen" im Schmelzfluss: die Bestimmung. der Sauerstoffionen-Konzentration |journal=[[Zeitschrift für Elektrochemie|Z. Elektrochem]] |volume=45 |issue=4 |pages=303–309 |language=de}}</ref> in 1939, further improved by [[Håkon Flood]] {{circa|1947}}<ref name="flood">{{cite journal |last1=Flood |first1=H. |author-link=Håkon Flood |last2=Forland, T. |year=1947 |title=The Acidic and Basic Properties of Oxides |journal=[[Acta Chemica Scandinavica]] |volume=1 |issue=6 |pages=592–604 |doi=10.3891/acta.chem.scand.01-0592 |pmid=18907702|doi-access=free }}</ref> and is still used in modern [[geochemistry]] and [[electrochemistry]] of [[molten salt]]s. This definition describes an acid as an oxide ion ({{chem2|O(2-)}}) acceptor and a base as an oxide ion donor. For example:<ref name="drago">{{cite journal |last1=Drago |first1=Russel S. |last2=Whitten |first2=Kenneth W. |year=1966 |title=The Synthesis of Oxyhalides Utilizing Fused-Salt Media |journal=[[Inorganic Chemistry (journal)|Inorganic Chemistry]] |volume=5 |issue=4 |pages=677–682 |doi=10.1021/ic50038a038}}</ref>
<math chem display=block>\begin{array}{ccccl}
  _\text{(base)} & & _\text{(acid)} \\[4pt]
  \ce{MgO} &+& \ce{CO2} &\longrightarrow& \ce{MgCO3} \\[4pt]
  \ce{CaO} &+& \ce{SiO2} &\longrightarrow& \ce{CaSiO3} \\[4pt]
  \ce{NO3-} &+& \ce{S2O7^2-} \!\! &\longrightarrow& \ce{NO2+ + 2 SO4^2-}
\end{array}</math>

This theory is also useful in the systematisation of the reactions of [[noble gas compound]]s, especially the xenon oxides, fluorides, and oxofluorides.<ref>{{Greenwood&Earnshaw1st|page=1056}}</ref>