What is Limiting reagent? Identify limiting reagent in reaction betwee

1.	What is Limiting reagent? Identify limiting reagent in reaction between 3.0 g H2 and 29 g O2.
Answer» A limiting reagent is a reactant which is present in lesser amount in a reaction. When it gets consumed, the reaction will not proceed irrespective of the amount of other reactant present in the reaction. It limits the amount of product formed. In other words, it determines the extent of reaction. Consider the reaction between hydrogen and oxygen to form water. It can be represented as: 2H₂ + O₂ = 2H₂O From the above reaction, it is clear that 2 moles of hydrogen react with 1 mole of oxygen. Molar mass of H₂ = 2 g Molar mass of O₂= 32 g This means that 4 g of H₂ reacts with 32 g of O₂ 3 g of H₂ reacts with = (32/4) x 3 g of O2 gas = 24 g As the given amount of O₂ is more than required. Therefore, O₂ is in excess and H₂ is limiting reagent here.

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