Lec 11 Limiting Reactant or Limiting Reagent सीमान्त अभिकारक या सीमान्त अभिकर्मक, 11th Chemsitry

रासायनिक समीकरण संतुलित करना |सीमान्त अभिकारक या सीमान्त अभिकर्मक |OMR|Summary

Many a time the reaction are carried out when the reactants are not present in the amounts required by a balanced chemical reaction. In such situations, one reactant is in excess over other. The reactant which is present in th lesser amount gets conserved after sometime and after that no further reaction takes place whatever be the amount of other reactant is present .Hence, the reactant which gets consumed , limits the amount of products formed and is therefore called limiting reagent. To determine the limiting reagent find the value of phi which is the ratio of (given) mole of a substance to the stoichiometric coefficient of that substance . The limiting reagent is the reagent which has minimum value of phi . In the above question , how much reactant is remaining at the completion of reaction and which one?

Many a time the reaction are carried out when the reactants are not present in the amounts required by a balanced chemical reaction. In such situations, one reactant is in excess over other. The reactant which is present in th lesser amount gets conserved after sometime and after that no further reaction takes place whatever be the amount of other reactant is present .Hence, the reactant which gets consumed , limits the amount of products formed and is therefore called limiting reagent. To determine the limiting reagent find the value of phi which is the ratio of (given) mole of a substance to the stoichiometric coefficient of that substance . The limiting reagent is the reagent which has minimum value of phi . The insecticide DDT is made by the reaction CClCHO("Chloral")+2C_(6)H_(5)Cl (chlorobenzene) rarr (ClC_(6)H_(4))_(2) CHCCl_(3)(DDT)+H_(2)O If 100 pound (lb) of chlorobenzene , how much DDT would be formed? (Assume the reaction goes to completion without side reactions or losses) [1 lb =453.6 g]

Many a time the reaction are carried out when the reactants are not present in the amounts required by a balanced chemical reaction. In such situations, one reactant is in excess over other. The reactant which is present in th lesser amount gets conserved after sometime and after that no further reaction takes place whatever be the amount of other reactant is present .Hence, the reactant which gets consumed , limits the amount of products formed and is therefore called limiting reagent. To determine the limiting reagent find the value of phi which is the ratio of (given) mole of a substance to the stoichiometric coefficient of that substance . The limiting reagent is the reagent which has minimum value of phi . The reduction of Cr_(2)O+_(3) by Al proceeds quantitatively on ignition of a suitable fuse. The reaction is : 2Al +Cr_(2)O_(3) rarr Al_(2)O_(3) +2Cr How much metallic chromium can be made by bringing to reaction temperature a mixture of 5 kg Al and 20 kg Cr_(2)O_(3) ?

Limiting reagent in a chemical reaction is that reactant which

Statement-1: Limiting reagent is the reactant that gets completed (or consumed) in a chemical reaction. Statement-2: Limiting reagent always has either least mass or the least moles among all the reactant available for a chemical reaction.

The reactant which is entirely consumed in reaction is known as limiting reagent. In the reaction 2A+4Brarr3C+4D , when 5 moles of A react with 6 moles of B, then (a) which is the limiting reagent? (b) calculate the amount of C formed?

Case 3 : Percentage Yield,Case 4: Amount / Moles OF Atleast 2 Reactants is given Idea OF Limiting Reagent (LR) and Excess Reagent (ER)