Stoichiometry & Limiting Reactant Check for Understanding

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
• sandwich

In this image, what are the information in red is called the_______.

• Product
• Reactant
• Chemical Subscript
• Yield

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

The Formula to make S'mores is:
2C + 1M + G₂ → C₂MG₂. If you have 5 Marshmallows (M), 9 Chocolate Pieces (C), and 9 Graham Cracker Halves (G), how many S'mores can you make?

• 5
• 4
• 8
• 42

Mole ratios are obtained from the

• balanced chemical equation
• periodic table
• molar mass

Tags

NGSS.HS-PS1-7

What is the mole ratio of H₂O to H₃PO₄ in the following chemical equation?   P₄O₁₀ + 6 H₂O --> 4 H₃PO₄ 

• 6:4
• 4:6
• 1:3
• 3:1

Tags

NGSS.HS-PS1-7

What is stoichiometry?

• The study of how the quantities of reactants and products are related in chemical reactions
• The study of the speed of reactions
• The study of how chemical reactions occur
• The study of types of reactions

When the limiting reactant is used up, what happens?

• the reaction speeds up
• the reaction slows down
• the reaction moves to its 2nd stage
• the reaction stops

In a balanced equation, the ratio between the coeffients of any two substances is called the _______. 

• mole ratio
• stoichiometry
• limiting reactant
• excess reactant

A reactant that remains after a chemical reaction stops

• stoichiometry
• mole ratio
• excess reactant
• limiting reactant

Tags

NGSS.HS-PS1-7