Identifying Limiting Reactant

What is a Limiting Reactant?

• it speeds up a reaction

• it is the reactant which runs out first

• how much reactant is left over

• it slows down a reaction

Tags

NGSS.HS-PS1-7

In the image, which reactant is limiting?

• The white molecules, because there are extra.

• The black atoms, because they are completely used up.

• The white molecules, because they are completely used up.

• The black atoms, because there are extra.

Tags

NGSS.HS-PS1-7

What does a limiting reactant determine?

• How much product can actually be made

• Which reactant will have excess

• The maximum theoretical product that can be made

• How much excess reactant gets used

Tags

NGSS.HS-PS1-7

How do we decide which is the limiting reactant?

• The reactant which gives the most grams of product

• The reactant which gives the least grams of product

• The most product produced

• The least product produced

Place the steps of determining limiting reactant in order.

• Write both given grams of reactant

• Find the product to convert both into

• set up and calculate two gram to gram conversions

• Find the lower answer

• Write down the reactant which gave the lower answer as the limiting reactant

Tags

NGSS.HS-PS1-7

2 Al + 3 Cl₂ -> 2 AlCl₃ 

If 2 moles of aluminum and 2 moles of chlorine react, which is the limiting reactant?

• AlCl₃

• Cl₂

• Al

Tags

NGSS.HS-PS1-7

What is the limiting reactant if 10 moles of NH₃ reacts with 30 moles of NO?

• NH₃

• NO

• N₂

• water

Tags

NGSS.HS-PS1-7

C₁₀H₈ + 12 O₂ -> 10 CO₂ + 4 H₂O

When 12 moles of O₂ reacts with 1.1 moles of C₁₀H₈ what is the limiting reactant?  

• Oxygen

• C₁₀H₈

• Water

• Carbon Dioxide

Tags

NGSS.HS-PS1-7

If 7.62 g Fe reacts with 8.67 g S, what is the limiting reactant?

• Fe

• S

• FeS

• neither 

Tags

NGSS.HS-PS1-7

What is the limiting reactant when 20 g CH₄ react with 15 g H₂O?

• CH₄

• H₂O

• CO₂

• H₂