Solid-State Reaction

Solid-State Reaction

 

in analytical chemistry, a chemical reaction between solids, the occurrence of which is detected by a characteristic color. Solid-state reactions also include reactions that result in the precipitation or dissolution of a colored deposit.

The procedure for carrying out analytical solid-state reactions is simple: small amounts (of the order of 1 mg) of a reagent and of the substance to be tested are mixed on a strip of filter paper or in a porcelain crucible, and the resulting color is observed. This method can be used to detect, for example, Ni2+ in its salts; here, small amounts of dimethylglyoxime and (NH4)2CO3 are added to the sample, as a result of which red dimethylglyoximine, Ni(C4H7O2N)2, is observed. Salts of Pb2+ react with KI to yield yellow Pbl2, and salts of Fe3+ react with K4Fe(CN)6 to give Prussian blue, Fe4[Fe(CN6)]3.

Solid-state reactions can be used in the field to identify minerals, ores, and chemical fertilizers. They can also be used to test pharmaceuticals.

REFERENCE

Voskresenskii, P. I. Analiticheskie reaktsii mezhdu tverdymi veshchestvami i polevoi khimicheskii analiz. Moscow, 1963.

S. A. POGODIN

References in periodicals archive ?
and Chausse A.: "The oxidation of carbonate green rust into ferric phases: solid-state reaction or transformation via solution." Geochim.
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The synthesis of GdAl[O.sub.3] is often challenging and usually carried out by solid-state reaction of [Gd.sub.2][O.sub.3] and [Al.sub.2][O.sub.3] at elevated temperatures [7].
These methods include sol-gel routes, hydrothermal, solid-state reaction, coprecipitation, spray pyrolysis, solution-combustion processes, and physical vapor deposition [17].
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There are different methods to synthesize zirconium diboride such as solid-state reaction, electrochemical reaction and mechanical methods.
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McDonald, "Solid-state reaction pathways of Sillenite-phase formation studied by high-temperature X-ray diffractometry and differential thermal analysis," Materials Research Bulletin, vol.
Bae et al., "LiMnP[O.sub.4] nanoplate grown via solid-state reaction in molten hydrocarbon for Li-ion battery cathode," Nano Letters, vol.
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[Zn.sub.2]Ti[O.sub.4] can easily be prepared by conventional solid-state reaction between 2ZnO and 1Ti[O.sub.2].
The conventional method of synthesizing PbTi[O.sub.3] relies on the solid-state reaction between Ti[O.sub.2] and PbC[O.sub.3] at high temperature.