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Stoichiometry Road Map

Road map showing mol-mol, mol-mass, and mass-mass stoichiometry calculations.
by

Mike Simurdiak

on 14 July 2010

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Transcript of Stoichiometry Road Map

Moles A Moles B Mass A Mass B Particles of A Volume of A at STP Particles of B Volume of B at STP 6.02 x 10 particles of A/mol A 23 22.4 L of A/mol A 6.02 x 10 particles of B/molB 23 Molar Mass of B Molar Mass of A 22.4 L of B/mol B Mole Ratio from the Balanced Equation The Roadmap Problem #1:
4 Na + O 2 Na O

How many mol of Na are required to produce 20.0 mol of Na O? 2 Given: 20.0 mol Na O

Unknown: mol of Na This is a mol - mol problem.

Here is where you would start and end on the roadmap. Problem #2:

2 Al + Fe O Al O + 2 Fe

If 30.0 g of Fe O reacts,
how many g of Fe is produced? Given: 30.0 g Fe O

Unknown: g of Fe This is a mass - mass problem.

Here is where you would start and end on the roadmap. 2 3 3 2 2 3 In actuality, you can start and end anywhere on the roadmap you choose. Problem #3:

2 K + Cl 2 KCl

If 3.0 mol of K reacts, how many
grams of KCl is produced? Given: 30.0 mol K

Unknown: g of KCl This is a mol - mass problem.

Here is where you would start and end on the roadmap. 2 2 3 Problem #4:

2 Li + 2 H O 2 LiOH + H

If 100.0 g of Li are reacted, how many mol of H are formed? 2 2 2 Given: 100.0 g of Li

Unknown: mol of H This is a mass-mol problem.

Here is where you would start and end on the roadmap. 2 The following presentation is example
problems showing you how each type of problem
uses the roadmap. KEY POINT:

All problems use a mole ratio from
the balanced equation! The End! 2 2 2
Full transcript