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oshoppa9402
2 năm trước
Bài 1: Viết phương trình chữ của các phản ứng hóa học sau: a) Canxi hiđroxit tác dụng với khí cacbonic CO2 tạo ra canxi cacbonat CaCO3 và nước. b) Ngâm sắt trong dung dịch axit clohiđric (HCl) thu được sắt (II) clorua và khí hiđro. c) Natri hiđroxit (NaOH) được sinh ra khi cho natri oxit (Na2O) tác dụng với nước. d) Thu được nhôm oxit (Al2O3) khi đốt cháy nhôm trong không khí (có khí oxi). e) Dẫn khí hiđro qua đồng (II) oxit (CuO – một chất rắn màu đen) nung nóng thì thu được chất rắn màu đỏ là đồng và hơi nước. f) Nhiệt phân thuốc tím (kali pemanganat – KMnO4) thu được kali manganat (K2MnO4), mangan đioxit (MnO2) và khí oxi.
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