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Câu 1. Có những phân bón hóa học: NH4NO3, NH4Cl, (NH4)2SO4, KCl, Ca3(PO4)2, CaHPO4, Ca(H2PO4)2, NH4H2PO4, (NH4)2HPO4, KNO3. a. Cho biết những phân bón trên thuộc loại hơp chất vô cơ nào và tên hóa học của chúng. b. Hãy xếp các phân bón trên thành các loại: - phân bón đơn (đạm, lân, kali) - phân bón kép (đạm và lân, đạm và kali) c. Nguyên tố hóa học chủ yếu nào trong mỗi loại phân bón kể trên cần cho sự phát triển của cây trồng. Câu 2. Có 3 mẫu phân bón hóa học: KCl, NH4NO3, Ca(H2PO4)2. Chỉ dùng dung dịch Ca(OH)2 làm thế nào để phân biệt được mỗi loại. Viết các PTHH minh họa.
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