Limiting Reactant Identification

2 BF₃ + 3 H₂ → 2 B + 6 HF

If 0.10 mol of BF₃ is reacted with 0.25 mol H₂, which reactant is the limiting reactant?

• BF₃

• H₂

• B

• HF

• There is no limiting reactant.

Answer explanation

Review your notes on the three step process for determining the limiting reactant.

Tags

NGSS.HS-PS1-7

What is the limiting reactant from the reaction between 20.0 g CuCl₂ and 15.0 g NaNO₃, as outlined in the reaction below?

CuCl₂ + 2 NaNO₃ → Cu(NO₃)₂ + 2 NaCl

• CuCl₂

• NaNO₃

• CU(NO₃)₂

• NaCl

• There is no limiting reactant.

Answer explanation

Review your notes on the three step process for determining the limiting reactant.

Tags

NGSS.HS-PS1-7

The reaction for the combustion of ethane is shown by the balanced reaction below:

2 C₂H₆ + 7 O₂ → 6 H₂O + 4 CO₂

1.45 g C₂H₆ was burned in the presence of 4.50 g O₂. Determine the limiting reagent.

• C₂H₆

• O₂

• H₂O

• CO₂

• There is no limiting reagent.

Answer explanation

Review your notes on the three step process for determining the limiting reactant.

Aluminum sulfite reacts with sodium hydroxide as shown in the reaction below:

Al₂(SO₃)₃ + 6 NaOH → 3 Na₂SO₃ + 2 Al(OH)₃

If 0.11 moles of Al₂(SO₃)₃ reacts with 0.11 moles of NaOH, what is the limiting reactant?

• Al₂(SO₃)₃

• NaOH

• Na₂SO₃

• Al(OH)₃

• There is no limiting reactant.

Answer explanation

Review your notes on the three step process for determining the limiting reactant.

Tags

NGSS.HS-PS1-7

Which chemical is the limiting reactant in the following reaction if 196.14 g Zn are heated with 287.90 g MoO₃?

3 Zn + 2 MoO₃ → Mo₂O₃ + 3 ZnO

• Zn

• MoO₃

• Mo₂O₃

• ZnO

• There is no limiting reactant.

Answer explanation

Review your notes on the three step process for determining the limiting reactant.

What does it mean when you have the same adjusted moles for each reactant?

In the reaction below, 2.34 g I₂O₅ react with 3.40 g CO. What is the limiting reactant?

I₂O₅ + 5 CO → 5 CO₂ + I₂

• I₂O₅

• CO

• CO₂

• I₂

Answer explanation

Review your notes on the three step process for determining the limiting reactant.

In the reaction below, 2.34 g I₂O₅ react with 3.40 g CO. How many grams of CO₂ are produced?

I₂O₅ + 5 CO → 5 CO₂ + I₂

• 1.54 g

• 5.34 g

• 515 g

• 30.3 g

Answer explanation

1) Determine the limiting reactant.

2) Use stoichiometry to calculate the mass of carbon dioxide.

Propane (C₃H₈) is combusted. If 3.4 g of propane are burned in the presence of 16.5 g of O₂, What is the limiting reactant?

• C₃H₈

• O₂

• CO₂

• H₂O

• There is no limiting reactant.

Answer explanation

1) Write out and balance the chemical equation.

2) Review your notes to determine the limiting reactant.

If 2.67 g Al react with 3.5 g HCl, what is the limiting reactant?

• aluminum

• hydrochloric acid

• aluminum chloride

• hydrogen

• no reaction occurs.

Answer explanation

1) Determine the type of reaction.

2) Write a balanced chemical equation.

3) Review your notes to determine how to identify a limiting reactant.

Tags

NGSS.HS-PS1-7

Consider the following equation to answer the question that follows:

2 As + 6 NaOH → 2 Na₃AsO₃ + 3 H₂

If 9.43 g As reacts with 12.6 g NaOH, what is the limiting reactant?

• As

• NaOH

• Na₃AsO₃

• H₂

• There is no limiting reactant.

Answer explanation

Review your notes to determine how to identify a limiting reactant.

Tags

NGSS.HS-PS1-7