Question

question 31 (1 point)
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in a chemical reaction, the limiting reagent is...
a) the reactant with the smallest coefficient.
b) the reactant with the largest coefficient.
c) the reactant with the least grams.
d) the reactant with the smallest molar mass.
e) the reactant that produces the least amount of product.

Explanation:

The limiting reagent is the reactant that gets consumed first in a chemical reaction. It determines the amount of product formed. To find the limiting reagent, we calculate the amount of product each reactant can produce. The reactant that produces the least amount of product is the limiting reagent.

• Option a: The coefficient size alone doesn't determine the limiting reagent.
• Option b: The coefficient size alone doesn't determine the limiting reagent.
• Option c: The mass (in grams) alone isn't sufficient. Molar amounts (related to moles, \(n=\frac{m}{M}\), where \(m\) is mass and \(M\) is molar mass) and stoichiometry are needed.
• Option d: Molar mass alone isn't sufficient. Mass and stoichiometry are also required.
• Option e: This is the correct definition. By calculating the amount of product each reactant can form (using stoichiometry from the balanced chemical equation), the reactant that gives the least product is the limiting reagent.

Answer:

E. The reactant that produces the least amount of product.