"रासायनिक समीकरण" के अवतरणों में अंतर

छो
बॉट: सन्दर्भ भाषा पाठ सुधारा
छो (बॉट: सन्दर्भ भाषा पाठ सुधारा)
* "<math>=</math>" -- यह संकेत रससमीकरणमितीय (स्टॉइकियोमेट्रिक) सम्बन्धों को दिखाने के लिए प्रयुक्त होता है।
* "<math>\rightarrow</math>" -- यह संकेत किसी नेट अग्रगामी अभिक्रिया (net forward reaction) को दर्शाने के लिए प्रयुक्त होता है ।
* "<math>\rightleftarrows</math>" -- यह संकेत ऐसी अभिक्रिया को दर्शाने के लिए किया जाता है जो अग्र और पश्च दोनों दिशाओं में हो रही हो।<ref>The notation <math>\rightleftarrows</math> was proposed in 1884 by the Dutch chemist [[Jacobus Henricus van 't Hoff]]. See: {{cite book|last1=van 't Hoff|first1=J.H.|title=Études de Dynamique Chemique|trans-title=Studies of chemical dynamics|date=1884|publisher=Frederik Muller & Co.|location=Amsterdam, Netherlands|pages=4–5|url=https://archive.org/stream/etudesdedynamiqu00hoff#page/4/mode/2up| language =French fr}} Van 't Hoff called reactions that didn't proceed to completion "limited reactions". From pp. 4–5: ''"Or M. Pfaundler a relié ces deux phénomênes … s'accomplit en même temps dans deux sens opposés."'' (Now Mr. Pfaundler has joined these two phenomena in a single concept by considering the observed limit as the result of two opposing reactions, driving the one in the example cited to the formation of sea salt [i.e., NaCl] and nitric acid, [and] the other to hydrochloric acid and sodium nitrate. This consideration, which experiment validates, justifies the expression "chemical equilibrium", which is used to characterize the final state of limited reactions. I would propose to translate this expression by the following symbol:
HCl + NO<sub>3</sub> Na <math>\rightleftarrows</math> NO<sub>3</sub> H + Cl Na .
I thus replace, in this case, the = sign in the chemical equation by the sign <math>\rightleftarrows</math>, which in reality doesn't express just equality but shows also the direction of the reaction. This clearly expresses that a chemical action occurs simultaneously in two opposing directions.)</ref>