In order to explore and compare the bleachability of sulfur dioxide and chlorine water, the students in the chemical experimental group designed the following experimental devices. (1) The laboratory

In order to explore and compare the bleachability of sulfur dioxide and chlorine water, the students in the chemical experimental group designed the following experimental devices. (1) The laboratory uses device A to prepare SO2. (1) When the plug is not removed, when the piston is opened, air cannot enter the interior of the separation funnel, resulting in the pressure in the separation funnel being less than atmospheric pressure and the liquid cannot flow out, so the answer is: the glass plug of the separation funnel will not be removed; ?

(2) MnO2+4HCl (concentrated) in the reaction? △? . ? In MnCl2+Cl2↑+2H2O, every 4 moles of HCl participate in the reaction, and the oxidized hydrogen chloride is 2 moles, that is, the oxidized hydrogen chloride accounts for 50% of the reaction, and the oxidized hydrogen chloride with 6 moles of HCl participates in the reaction is

3mol, the number of electrons transferred is 3NA=3×6.02× 1023, so the answer is: MnO2+2Cl-+4H+? △? . ? Mn2 ++ Cl2 ↑+ 2H2O； ? 3×6.02× 1023;

(3)SO2 has bleachability. When SO2 was introduced into magenta solution, magenta faded. The bleaching of SO2 is reversible, and when heated, the faded solution returns to its original red color. The hypochlorous acid produced by the reaction of chlorine and water is bleaching, so the magenta can also be bleached by introducing chlorine into the magenta solution. The bleaching of hypochlorous acid is irreversible, but it cannot be restored to its original red color when heated.

So, the answer is: magenta fades; Fuchsin fades; Faded magenta turns back to red; No obvious phenomenon;

(4) Chlorine gas has strong oxidizing property and sulfur dioxide has strong reducing property. When chlorine and sulfur dioxide react in aqueous solution at the ratio of 1: 1: Cl2+SO2+2h2o ═ 2hcl+H2SO4, the product will not be bleached, so when SO2 and Cl2 are simultaneously introduced into magenta solution at the ratio of1:1

So the answer is: Cl2+SO2+2h2o ═ 4h+2cl-+so42-.