Question

Please help ASAP

2NaCl + F₂ → 2NaF + Cl₂

The most efficient ratio for the reaction is 2 NaCl 1 F2.
Which set of reactants will be the most efficient (least wasteful of materials) for the reaction?

A. 4.0 mol NaCl and 1.0 mol F,
B. 0.5 mol NaCl and 0.25 mol F₂
C. 2.0 mol NaCl and 1.5 mol F₂
D. 5.0 mol NaCl and 7.0 mol F₂

Answer 1

The most efficient set of reactants for the reaction is option B. 0.5 mol NaCl and 0.25 mol F₂, which adheres to the stoichiometric ratio of 2:1 without excess reactants.

Step-by-step explanation:

The most efficient ratio for the reaction 2NaCl + F₂ → 2NaF + Cl₂ is 2 moles of NaCl to 1 mole of F₂. We need to choose the combination of reactants that reflects this ratio without an excess of any reactant.

A. 4.0 mol NaCl and 1.0 mol F₂ uses twice as many NaCl molecules as F₂ molecules, which is the correct ratio.

B. 0.5 mol NaCl and 0.25 mol F₂ also reflects the desired 2:1 ratio and there will be no excess of any reactant.

C. 2.0 mol NaCl and 1.5 mol F₂ has an excess of F₂, making it inefficient.

D. 5.0 mol NaCl and 7.0 mol F₂ uses much more of both reactants than needed and is not an efficient ratio.

The correct answer is that the most efficient (least wasteful) set of reactants for the reaction is B. 0.5 mol NaCl and 0.25 mol F₂, since both reactants are used completely with no excess, adhering to the stoichiometric ratio.

Answer 2

The balanced chemical equation for the reaction is:

2NaCl + F₂ → 2NaF + Cl₂

According to the equation, the most efficient ratio for the reaction is 2 moles of NaCl to 1 mole of F₂.

A. 4.0 mol NaCl and 1.0 mol F₂: This is a 2:0.5 ratio, which is more than the required ratio of 2:1. Therefore, this set of reactants will not be the most efficient.

B. 0.5 mol NaCl and 0.25 mol F₂: This is a 2:1 ratio, which is exactly the required ratio for the reaction. Therefore, this set of reactants will be the most efficient.

C. 2.0 mol NaCl and 1.5 mol F₂: This is a 2:1.5 ratio, which is more than the required ratio of 2:1. Therefore, this set of reactants will not be the most efficient.

D. 5.0 mol NaCl and 7.0 mol F₂: This is a 2:7 ratio, which is much more than the required ratio of 2:1. Therefore, this set of reactants will not be the most efficient.

Therefore, the answer is B. 0.5 mol NaCl and 0.25 mol F₂, as it is the only set of reactants that has the most efficient ratio of 2:1.