Stoichiometry

Simple Stoichiometry

200

Define stoichiometry.

A section of chemistry that involves reactants and/or products in a chemical reaction to determine its quantitative data.

300

KClO₃ decomposes into oxygen gas and potassium chloride.  How much KClO₃ must decompose to make 9 moles of gaseous oxygen?  (No sig figs required)

33.3 moles

400

How many grams of lithium nitrate will be needed to react with lead(IV) sulfate to produce 250 grams of lithium sulfate?

310 g

500

According to reaction between aluminum and oxygen gas to produce aluminum oxide,

How many moles of solid aluminum are required to produce 4.5 moles of aluminum oxide?

9.0 moles

Limiting Reactant

200

What is a limiting reagent? 

-A reactant that gets consumed first in a chemical reaction

-A reactant that binds to an element first in a chemical reaction

-A reactant that determines the quality of a chemical reaction’s product

-A reactant that gets consumed first in a chemical reaction

300

This is the term used to describe the maximum amount of product that a reaction is capable of producing.

Theoretical Yield

400

If you react 15 grams of Mg with 20 liters of O₂, which one is the limiting reagent?

Mg

500

According to the equation N₂ + 3H₂ → 2NH₃, 

if 5.22 grams of N₂ and 12.1 grams of H₂ react, what mass of product is formed?

6.34 grams of NH₃

Percent Yield

200

What is Percent Yield?

Actual/Theoretical  X 100%

300

Is this true? Mole ratios are found from the balanced equation of a reaction. 

 

True

400

12.34 moles calcium nitrate and reacts with excess sodium carbonate to produce 3.43 moles of calcium carbonate.

What is the percent yield of this reaction?

27.8%

500

23.0 grams Silver (I) Nitrate and 46.44 grams Calcium chloride react to produce 5.0 grams of silver chloride.

What is the percent yield of this reaction?

Percent Yield = 26%