Limiting Reactants Flashcards
What is Fe2O3?
hematite
Where is hematite found?
in banded iron formations
What is the chemical name of hematite?
iron (III) oxide
Why is there a III next to the iron in iron (III) oxide?
the iron is reacting with 3 oxygens
Where does Fe2O3 decompose?
into oxygen and iron (solid) at a temperature of 200 celsius
What is the limiting reactant?
reactant that is completely consumed in a chemical reaction and limits the quantity of product produced
What is the excess reactant?
reactant that remains after chemical reaction is completed
What is theoretical yield?
amount of product that can be made based on amount of limiting reactant
What is actual yield?
amount of product actually produced by a chemical reaction
What is percent yield?
(actual yield/theoretical yield) x 100%
Why don’t reactions usually go to 100%?
side reactions, incomplete mixing of reactants, lack of time, inability to fully collect all the product, reaction equilibrium
What is the quantity of excess reactant remaining?
amount of excess that remains after the reaction is complete
What are the steps of excess reaction problems?
1) go to mol of each reactant
2) convert (moles limiting reactant)–>(moles excess reactant)
3) (moles excess initial) - (moles excess consumed) = (moles remaining)
What is the coal combustion equation?
C + O2 –> CO2 + energy
What is industrial smog?
production of sulfur compounds that arise from coal combustion originates with the release of sulfur within the coal as sulfur dioxide
