| (1) ①? Alcohol lamp ? ② long-necked funnel (2) E ?CaCO 3 + 2HCl = CaCl 2 + CO 2 ↑ + H 2 O (3) Potassium permanganate/potassium chlorate and manganese dioxide ? (4) Fe 3 O 4 ? Prevent the gas cylinder from rupturing due to heat (other reasonable answers are also given points) |
| (1) Familiarize yourself with the names of commonly used instruments: ① Alcohol lamp. ② long-necked funnel; (2) the production of carbon dioxide can be used B as a generating device, its collection device is usually E, the production of carbon dioxide chemical equation: CaCO 3 +2HCl = CaCl 2 +CO 2 ↑ +H 2 O; (3) the laboratory now needs to produce oxygen, the use of the above apparatus, but also need the drugs are: potassium permanganate or potassium chlorate and manganese dioxide or hydrogen peroxide; (4) we do iron wire Burning in oxygen experiment, the red-hot wire into the cylinder containing oxygen, the reaction generates Fe 3 O 4; do this experiment when the oxygen cylinder pre-added a small amount of water, the role of water is: to prevent the cylinder rupture by heat. Therefore, the answer is: (1) ① alcohol lamp. ② long-necked funnel; (2) E, CaCO 3 +2HCl = CaCl 2 +CO 2 ↑ +H 2 O; (3) potassium permanganate or potassium chlorate and manganese dioxide or hydrogen peroxide; (4) Fe 3 O 4 . Preventing the rupture of the collecting cylinder by heat. |