Limiting Reagent

The limiting reactant

• slows the reaction down

• is used up first

• is the reactant that is left over

• controls the speed of the reaction

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 a limiting reactant?

• the reactant that determines how much product can be made

• the reactant that is in excess

• the product that you can make the most of

• the amount of reactants that react with each other

Identify the limiting reagent when 6.00 g HCl combines with 5.00 g Mg to form MgCl₂.

• Mg

• H₂

• MgCl₂

• HCl

Which reactant is the limiting reagent and why?

• Hydrogen is the limiting reagent because two moles of hydrogen is required for every one mole of oxygen to produce two water.

• Oxygen is the limiting reagent because two moles of hydrogen is required for every one mole of oxygen to produce two water.

Tags

NGSS.HS-PS1-7

The limiting reactant . . .

• slows the reaction down.

• is used up first.

• is the reactant that is left over.

• controls the speed of the reaction.

Identify the limiting reagent when 6.00 moles HCl combines with 5.00 moles Mg to form MgCl₂.
 
1 Mg +  2 HCl --> 1 MgCl₂  +  1 H₂   
 

• Mg

• H₂

• MgCl₂

• HCl

Tags

NGSS.HS-PS1-7

Which reactant is the limiting reagent and why?

• Hydrogen is the limiting reagent because two moles of hydrogen is required for every one mole of oxygen to produce two water.

• Oxygen is the limiting reagent because two moles of hydrogen is required for every one mole of oxygen to produce two water.

Tags

NGSS.HS-PS1-7

If 4 moles of hydrogen (H2) gas react with 2 moles of oxygen (O2) gas, what is the limiting reagent in the production of water?

• Hydrogen

• Oxygen

• Both reactants are in excess

• Neither, they react completely without any excess

Tags

NGSS.HS-PS1-7

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

• P₄

• O₂

• P₄O₆ 

• none of the above

Tags

NGSS.HS-PS1-7