Chemistry Unit 8 Lesson 3 Practice

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

• Al
• Both reactants are in perfect stoichiometric mix

Tags

NGSS.HS-PS1-7

What is the limiting reactant if 10.0 moles of NH₃  react  with 30.0 moles of NO? You can pick either product to determine limiting reactant.

4NH₃ + 6NO --> 5N₂ + 6H₂O

• NH₃
• NO
• N₂
• H₂O

Tags

NGSS.HS-PS1-7

4NH₃ + 5O₂ --> 4NO + 6H₂O

What is the theoretical yield in grams of NO are formed if 6.30g of ammonia (NH₃) react with 1.80g of oxygen (O₂)? 

ROUND TO THE NEAREST TENTH. DO NOT INCLUDE UNITS IN YOUR ANSWER.

Mathematical Equivalence

ON

Tags

NGSS.HS-PS1-7

SO₂ + PCl₅ --> SOCl₂ + POCl₃

What is the theoretical yield in grams of SOCl₂ when 16.2g SO₂ react with 13.7g PCl_5? 

• 7.87g
• 30.1g
• 26.4g
• 19.8g 

Tags

NGSS.HS-PS1-7

Using the following equation: Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l) How many grams of iron can theoretically be made from 6 moles H₂ and 3 moles of Fe₂O₃ ?

• 335.4 g Fe

• 223.6 g Fe

• 167.7 g Fe

• 55.9 g Fe

Tags

NGSS.HS-PS1-7

A reactant that remains after a chemical reaction stops

• stoichiometry
• mole ratio
• excess reactant
• limiting reactant

Tags

NGSS.HS-PS1-7

Use the equation 2 Al + 3 Cl₂ ---> 2 AlCl₃.  If 2 moles of aluminum and 2 moles of chlorine are reacted, how many moles of Aluminum chloride are theoretically produced?

ROUND TO THE NEAREST TENTH. DO NOT INCLUDE UNITS IN YOUR ANSWER.

Mathematical Equivalence

ON

Tags

NGSS.HS-PS1-7

What is the theoretical yield of H₂O in moles if 10.0 moles of NH₃  react  with 30.0 moles of NO?

4NH₃ + 6NO --> 5N₂ + 6H₂O

ROUND YOUR ANSWER TO THE NEAREST WHOLE NUMBER. DO NOT INCLUDE UNITS IN YOUR ANSWER.

Mathematical Equivalence

ON

The limiting reactant

• slows the reaction down
• is used up first
• is the reactant that is left over
• controls the speed of the reaction

You need 2 pieces of bread, 1 tablespoon of peanut butter and 2 tablespoons of jelly to make a sandwich.  If you have 10 pieces of bread, 4 tablespoons of peanut butter and 20 tablespoons of jelly, what is the limiting reactant?

• bread
• jelly
• peanut butter
• sandwiches