In a reaction A + B₂ → AB₂ Identify the limiting reagent, if any, In the given 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
Answers
According to the reaction: A + B₂ → AB₂, one atom of A reacts with one molecule of B so,
(i) 300 atoms of A + 200 molecules of B: 300 atoms of A will react with 200 molecules of B leaving at least 100 atoms of A unreacted. Here, B is the limiting reagent.
(ii) 2 mol A + 3 mol B: In this reaction, 1 molecule of A reacts with 1 molecule of B. hence, 2 molecules of A will react with 2 molecules of B. Here, 1 molecule of A will be left unreacted. A is limiting reagent.
(iii) 100 atoms of A + 100 molecules of B: All 100 atoms of A combine with 100 molecules of B. No unreacted parts i.e. it is a stoichiometric mixture. Therefore there is no limiting reagent.
(iv) 5 mol A + 2.5 mol B: 2.5 molecules of A react with 2.5 molecules of B leaving 2.5 molecules of A unreacted. Here, B is the limiting reagent.
B is limiting reagent.
(v) 2.5 mol A + 5 mol B: In this reaction, 2.5 molecules of A react with 5 molecules of B. Hence, 2.5 molecules of B will be left unreacted. Here, A is limiting reagent.
A is limiting reagent
Answer:
B is limiting reagent. (v) 2.5 mol A + 5 mol B: In this reaction, 2.5 molecules of A react with 5 molecules of B. Hence, 2.5 molecules of B will be left unreacted.
Explanation:
B is limiting reagent. (v) 2.5 mol A + 5 mol B: In this reaction, 2.5 molecules of A react with 5 molecules of B. Hence, 2.5 molecules of B will be left unreacted.