Free Printable Conceptual Limiting Reagent

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Conceptual Limiting Reagent

Total questions: 21

Worksheet time: 51mins

Name

Class

Date

The limiting reactant

slows the reaction down

is used up first

is the reactant that is left over

controls the speed of the reaction

Use the equation 2 Al + 3 Cl₂ ---> 2 AlCl₃. If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.

AlCl3

Cl2

When does a chemical reaction stop?

When the lab is finished

When the excess reactant is used up

When the limiting reactant is used up

Chemical reactions never stop

What is the limiting reactant if 10 moles of NH₃ react with 30.0 moles of NO?
4NH₃+6NO --> 5N₂ + 6H₂O

NH₃

N₂

water

When 12 moles of O₂ reacts with 1.1 mole of C₁₀H₈what is the limiting reactant? C₁₀H₈ + 12 O₂ --> 10 CO₂ + 4 H₂O

Oxygen

C₁₀H₈

Water

Carbon Dioxide

1 Cheese + 2 Bread --> 1 grilled cheese

How many grilled cheeses can you make with 26 slices of bread and 14 pieces of cheese?

P₄+ 3O₂--> P₄O₆
What is the limiting reactant is 12 moles of P₄react with 15 moles of O₂?

P₄

O₂

P₄O₆

none of the above

1 Body + 4 Tires --> 1 car
How many cars can you make with 92 tires and 34 bodies?

What is the chemical formula for sodium hydroxide?

NaH₂

SO₂

NaOH

OHS

10.

Which one of the following is ammonium?

PO₄^3-

OH^-

NH_4⁺

NH₃

11.

When hydrogen reacts with oxygen, it produces water. 2H₂ + O₂ -> 2H₂O

If 2 moles of hydrogen react with 1 mole of oxygen, then...

2 moles of water are produced

1 mole of water are produced

1/2 mole of water are produced

4 moles of water are produced

12.

What is the conversion factor that allows you to convert from substance A to substance B?

Mole ratio

Avogadro's number

22.4 L

the mass of the substance

13.

Which mole ratio is correct for the given chemical equation?

2N₂ (g) + 5O₂ (g) -----> 2N₂O₅ (g)

2 mol N₂ to 5 mol N₂O₅

2 mol N₂ to 2 mol N₂O₅

5 mol O₂ to 2 mol NO₂

None are correct.

14.

The excess reactant is not completely used up during the reaction.

True

False

15.

4. If the quantities of reactants are given in units other than moles, what is the first step for determining the amount of product?

Determine the amount of product from the given amount of limiting reagent.

Convert each given quantity of reactant to moles.

Identify the limiting reagent.

16.

Use the equation 2 Al + 3 Cl₂ ---> 2 AlCl₃. If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.

AlCl3

Cl2

17.

What is the arrow in a chemical equation...
H_{2 +}O --> H₂O

Reactants

Products

Yields

Chemical Equation

18.

CH₄ + 2H₂O --> CO₂+ 4H₂What is the limiting reactant when 20g CH₄react with 15g H₂O?

CH₄

H₂O

CO₂

H₂

19.

4NH₃+ 5O₂--> 4NO + 6H₂O
How many grams of NO are formed if 6.30g of ammonia react with 1.80g of oxygen?

0.37g

0.045g

1.35g

11.1g

20.

SO₂+ PCl₅--> SOCl₂+ POCl₃
How much SOCl₂is produced when 16.2g SO₂react with 13.7g PCl_5?

7.87g

30.1g

26.4g

19.8g

21.

Fe + S --> FeS
If 7.62g Fe react with 8.67g S, what is the limiting reactant?

FeS

none

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Conceptual Limiting Reagent

Total questions: 21

Worksheet time: 51mins

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