Limiting Reagent
01.05 | 
Diposting oleh
Awal
From the balanced equation for a chemical reaction it is possible to calculate the exact quantities of reactants which are consumed and products which are formed. For example, consider the reaction between nitrogen momooxide gas and oxygen gas to form nitrogen dioxide. The equation for the reaction is :
3 NO (g) + O2 (g) → 3 NO2 (g)
From the equation it is evident that every mole of O2 which reacts, three moles of NO are needed and three moles of NO2 will be produced. However, consider the situation where the ratio of coefficients in the balanced chemical equation. In this situation, one of the reactants will be the limiting reagent and the other will be present in excess.
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3 NO (g) + O2 (g) → 3 NO2 (g)
From the equation it is evident that every mole of O2 which reacts, three moles of NO are needed and three moles of NO2 will be produced. However, consider the situation where the ratio of coefficients in the balanced chemical equation. In this situation, one of the reactants will be the limiting reagent and the other will be present in excess.
Click here to download animation
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