During the summer vacation, Xiaoling found that the nitrogen fertilizer that Yuanda left at home might be one of ammonium bisulfate, ammonium sulfate and urea.
First, sample, and add a small amount of hydrated lime (CaOH). If there is no pungent smell, it is urea. If there is a pungent smell, it is
Ammonium hydroxide, ammonium sulfate or ammonium sulfate. Then add a small amount of dilute hydrochloric acid. If there is a lot of bubbles. This is ammonium bicarbonate. If no bubbles appear, it is ammonium sulfate.