Limiting Reagent Worksheet
Understand and calculate limiting reagents in chemical reactions, determine theoretical yield, and identify excess reactants for Grade 10 Chemistry students.
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Limiting Reagent Worksheet
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. In a chemical reaction, the reactant that is completely consumed and limits the amount of product formed is called the .
2. The reactant that is not completely used up in a reaction is known as the reactant.
3. The maximum amount of product that can be formed from a given amount of reactants is called the yield.
1. Which of the following is true about a limiting reagent?
It is the reactant present in the largest quantity.
It determines the amount of product formed.
It is always the reactant with the lowest molar mass.
It is the reactant leftover after the reaction.
2. Consider the reaction: 2H₂(g) + O₂(g) → 2H₂O(l). If you have 10 moles of H₂ and 3 moles of O₂, which is the limiting reagent?
H₂
O₂
H₂O
Neither, they are in perfect stoichiometric ratio.
1. For the reaction: N₂(g) + 3H₂(g) → 2NH₃(g). If 28.0 grams of N₂ reacts with 12.0 grams of H₂:
a) Determine the limiting reagent.
b) Calculate the theoretical yield of NH₃ in grams.
c) Identify the excess reactant and calculate the mass of the excess reactant remaining.
1. The limiting reagent is always the reactant with the smallest initial mass.
True
False
2. In a reaction, it is possible to have two limiting reagents.
True
False
Explain, in your own words, why understanding the concept of a limiting reagent is important in industrial chemical processes.
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