Stoichiometry LR vs ER

What is the definition of a limiting reactant in a chemical reaction?

• The substance that is completely used up first in a reaction.

• The substance that is left over after a reaction.

• The substance that controls the rate of the reaction.

• The substance that is used to catalyze the reaction.

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DOK Level 1: Recall

• Both are limiting.

• Neither is limiting.

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DOK Level 1: Recall

What is the main role of the excess reactant in a chemical reaction?

• To increase the reaction rate.

• To be completely used up during the reaction.

• To remain after the limiting reactant is used up.

• To decrease the yield of the product.

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DOK Level 1: Recall

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DOK Level 2: Skill/Concept

• 5 moles

• 10 moles

• 15 moles

• 20 moles

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DOK Level 2: Skill/Concept

• 2 moles

• 4 moles

• 6 moles

• 8 moles

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DOK Level 2: Skill/Concept

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DOK Level 2: Skill/Concept

• 10 moles

• 13.33 moles

• 16.67 moles

• 20 moles

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DOK Level 3: Strategic Thinking

• 4 moles

• 6 moles

• 8 moles

• 10 moles

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DOK Level 3: Strategic Thinking

• X

• Y

• Both are limiting.

• Neither is limiting.

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DOK Level 3: Strategic Thinking