Chemistry - Factors in a chemical reaction
Factors in a chemical reaction
Two factors that significantly affect the economic viability of a
particular reaction are the rate and the extent of the reaction - neither
of which is indicated by the chemical equation.
* The rate of a reaction is how fast the reactants are converted into
The extent of a reaction is the proportion (fraction) of the reactants
that has been converted into products.
A critical factor in the production of ammonia, or any other chemical is
the actual yield of product. The quantity of product that is calculated to
form on the basis of equation stoichiometry is called the theoretical
yield. The amount of product actually obtained in a reaction is called the
The actual yield is almost always less than (and should never be greater
than) the theoretical yield.
There are many reasons why the actual yield of a reaction is generally
less than the theoretical yield. Part of the reactants may not react or, in
a side reaction, may react to give a different product. It can also be
difficult to collect all of a product.
The percentage yield of a reaction compares the actual yield with the
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