Saturday, January 18, 2014

How can we obtain pure potassium nitrate which is free of soil?Potassium nitrate (saltpetre) is used as a fertilizer. It occurs naturally, mixed...

There are numerous ways to obtain saltpeter from other
salts, combined with nitric acid.


For
instance:


KOH + HNO3 -> KNO3 +
H2O


2K + 2HNO3 -> 2KNO3 +
H2


K2O + 2HNO3 -> 2KNO3 +
H2O


2KOH + N2O5 -> 2KNO3 +
H2O


NaNO3 + KCl -> KNO3 +
NaCl


K2CO3 + 2HNO3 -> 2KNO3 + H2O +
CO2

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