Question 23 of 36intermediate🔧 ApplyNumerical5 marks
In a reaction A + B₂ → AB₂ Identify the limiting reagent, if any, in the following reaction mixtures. (i) 300 atoms of A + 200 molecules of B (ii) 2 mol A + 3 mol B (iii) 100 atoms of A + 100 molecules of B (iv) 5 mol A + 2.5 mol B (v) 2.5 mol A + 5 mol B
(i)
Answer
B is the limiting reagent
(ii)
Answer
A is the limiting reagent
(iii)
Answer
No limiting reagent (stoichiometric amounts)
(iv)
Answer
B is the limiting reagent
(v)
Answer
A is the limiting reagent
Explanation
According to the balanced chemical equation , 1 atom/mole of A reacts with 1 molecule/mole of B. The reactant that gets consumed first limits the amount of product formed and is called the limiting reagent. By comparing the available amounts of reactants with their stoichiometric ratio, we can identify which reactant will be exhausted first.