Understanding Limiting and Excess Reactants

What analogy is used to explain the concept of limiting and excess reactants?

• Building a house

• Writing a book

• Cooking a meal

• Painting a picture

What determines the maximum amount of product that can be made in a reaction?

• The amount of catalyst

• The excess reactant

• The temperature of the reaction

• The limiting reactant

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NGSS.HS-PS1-6

In the cheeseburger analogy, what was the limiting reactant?

• Buns

• Cheese slices

• Meat pieces

• Lettuce leaves

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NGSS.HS-PS1-7

How do you identify the limiting reactant in a chemical reaction?

• It's determined by the reaction's temperature

• It's the reactant present in the highest quantity

• It's the reactant that runs out first

• It's always the reactant with the smallest mass

What is left over after a reaction has stopped due to the limiting reactant being used up?

• Activation energy

• Excess reactant

• Product

• Catalyst

Tags

NGSS.HS-PS1-7

In the bread roll example, what was the limiting reactant?

• Flour

• Water

• Yeast

• Salt

When applying the concept to a chemical reaction involving N2 and H2 to produce NH3, which was the limiting reactant?

• Both N2 and H2

• NH3

• H2

• N2

How much excess N2 was left over in the chemical reaction example?

• 1.4 moles

• 3.2 moles

• 1.8 moles

• 2.4 moles

Tags

NGSS.HS-PS1-7