I. Fill in the blanks with the following serial numbers: ① beaker ② test tube ③ rubber-tipped dropper ④ glass instrument that can be directly heated by burning spoon _ _ _ _ _ _; Sucking or dropping a

I. Fill in the blanks with the following serial numbers: ① beaker ② test tube ③ rubber-tipped dropper ④ glass instrument that can be directly heated by burning spoon _ _ _ _ _ _; Sucking or dropping a small amount of liquid ⅰ. Both the test tube and the burning spoon can be directly heated, so the glass instrument directly heated is the test tube; When the beaker is heated, it needs to be padded with asbestos mesh, and the rubber-tipped dropper cannot be heated; The rubber-head dropper has a small volume and can be used to absorb and drop a small amount of liquid;

ⅱ. (1) ① The instrument for heating the test tube is an alcohol lamp, which is used to provide a heat source; ② The instrument for collecting gas is a gas container;

(2) The reactant for producing oxygen from potassium permanganate is that potassium permanganate is solid and needs to be heated, so the generator is selected as D; Because the density of oxygen is higher than that of air, it is collected by upward air discharge method, but it is not easy to dissolve in water and is collected by drainage method; Use a spoon when taking potassium permanganate medicine; The reactant of producing oxygen by potassium permanganate is written on the left side of the arrow, and the products are written on the right side of the arrow. The reaction condition is that heating is written on the top of the arrow, so the text expression is: potassium permanganate △ potassium permanganate+manganese dioxide+oxygen;

(3)① Check the airtightness of the device. To form a sealed device, add a small amount of water to the lower end of the submerged long-necked funnel in the conical bottle to form a sealing system;

③ Pull the piston of syringe C slowly to reduce the pressure in the device, and bubbles will escape from the lower end of the long-necked funnel under the action of external atmospheric pressure;

④ Carbon dioxide can be dissolved in water and cannot be collected by drainage method, and its density is higher than that of air, so it can only be collected by upward air discharge method; Because carbon dioxide can neither burn nor support combustion, it is filled with burning wood strips, and the burning wood strips are placed at the mouth of the gas container. If it is extinguished, it means that it has been collected fully; Replacing long-necked funnel with syringe C can adjust the flow rate of liquid and control the reaction speed; The reactants are calcium carbonate and hydrochloric acid written on the left side of the arrow, and the products are calcium chloride, water and carbon dioxide written on the right side of the arrow, so the text expression is: calcium carbonate+hydrochloric acid → calcium chloride+water+carbon dioxide. < P > So the answer is: i.②; ③； Ⅱ. (1) ① Alcohol lamp; (2) gas cylinders; （2）D； F or g; A； Potassium permanganate △ potassium permanganate+manganese dioxide+oxygen; (3)① Immerse the lower end of the long-necked funnel; (3) bubbles escape from the lower end of the long-necked funnel; ④G； Put the burning batten at the mouth of the gas container, and the batten will be collected when it is extinguished; The reaction rate can be controlled; Calcium carbonate+hydrochloric acid → calcium chloride+water+carbon dioxide.