Preparation and properties of sodium nitroprusside
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Preparation. Sodium nitroprusside can be synthesized by digesting a solution of potassium ferrocyanide in water with nitric acid, followed by neutralization with sodium carbonate: K4[Fe(CN)6] + 6 HNO3 → H2[Fe(CN)5(NO)] + CO2 + NH4NO3 + 4 KNO.
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