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Stoichiometry

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toyrubberducky's version from 2015-10-06 10:54

Section

Stoichiometry is using the known Ratios of chemicals in a reaction to determine the amount of reactants or products used/produced.

 

You must have a balanced chemical equation to determine the stoichiometric ratio between reactants and products.

 

An example:

 

Given the balanced equation 4NH3 + 5O_2 --> 4NO + 6H2O How many mols of H2O would form from a reaction of 0.6mols of NH3?

 

Question Answer Column 3
memorize

 

-So if we divide the amount of mols of NH3 by 4 and multiply by 6 we will get the amount of mols of H2O produced n(H2O) = 0.6mol / 4 x 6
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              = 0.9mol of H2O

 

Answer = 0.9 mol of H2O