(1) The name of an instrument is a separatory funnel;
(2) The chemical equation of the reaction in B is: Zn+2HCl ═ ZnCl2+H2 ↑;
(3) Xiao Huang grinds the massive Cu-Zn alloy into powder before the experiment, aiming at: accelerating the reaction speed;
(4) How to check the air tightness of the device: improve the D tube, after a moment of rest, there is still a height difference between the C and D liquid levels, and the air tightness is good;
(5) In order to make the measured gas volume more accurate, when recording the liquid level scale in C, in addition to making the line of sight level flush with the lowest concave liquid level, the liquid levels in D and C should also be flush;
(6) In Xiao Huang's discovery experiment, due to the lack of a certain step, the data is missing and cannot be calculated. The steps are as follows: measuring the quality of a copper-zinc alloy sample;
(7) Usually, the dosage of drugs must be estimated before the experiment. If the amount of hydrochloric acid is insufficient during the experiment, should acid be added halfway or repeat the experiment: repeat the experiment; The reason is that adding acid in the middle will cause gas to escape and affect the accurate measurement of gas volume.