객관식
Suppose 0.0350 g Mg is reacted with 10.00 mL of 6 M HCl to produce aqueous magnesium chloride and hydrogen gas. Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g). What is the limiting reactant in this reaction?
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3. Chemical Reactions
Limiting Reagent
객관식
In a chemical reaction, which of the following is the limiting reagent?
A
The reactant that is present in excess
B
The product formed in the greatest amount
C
The reactant with the highest molar mass
D
The reactant that is completely consumed first
검증된 단계별 안내1
Understand the concept of a limiting reagent: In a chemical reaction, the limiting reagent is the reactant that is completely consumed first, limiting the amount of product that can be formed.
Identify the reactants in the given chemical reaction and their initial amounts, usually given in moles or grams.
Convert the amounts of each reactant to moles if they are given in grams, using the formula: \( \text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}} \).
Use the balanced chemical equation to determine the mole ratio between the reactants and the products.
Compare the mole ratio of the reactants used in the reaction to the mole ratio from the balanced equation to identify which reactant will be consumed first, thus determining the limiting reagent.
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