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Câu 1. (2 điểm). Hoàn thành sơ đồ phản ứng. Cl2 - HCI → NaCl → Cl2 → FeCl3 Câu 2. (2 điểm). Sục khí Cl2 vào dung dịch NA2CO3 thấy có khí CO2 thoát ra. Giải thích hiện tượng và viết các phương trình hóa học của các phản ứng xảy ra. Câu 3. (3 điểm) Cho 3,68 gam hỗn hợp CaO và CaCO3 phản ứng vừa đủ với 0,5 lít dung dịch HCI thu được 0,448 lít khí (đkte). al Tính % khối lượng mỗi chất trong hỗn hợp đầu. b/ Tính nồng độ mol dung dịch thu được, giả sử thể tích dung dịch không thay đổi.
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