一、器材及试剂400 mL烧杯,150 mL三角烧瓶,100 mL烧杯,NaOH溶液,40%HBr溶液,30%H_2O_2溶液,冰块。二、反应原理2HBr+H_2O_2=Br_2+2H_2O;Br_2+2NaOH=H_2O+NaBr+NaBrO三、实验装置实验装置如附图所示。附图实验装置四、实验步骤1.400 mL的大烧杯中装有含冰块的NaOH溶液(冰水浴)。2.将H_2O_2装在三角烧瓶中,三角烧瓶放入大烧杯中使之与杯底平齐,烧杯液面刚好到三角烧瓶瓶颈。之 First, equipment and reagents 400 mL beaker, 150 mL conical flask, 100 mL beaker, NaOH solution, 40% HBr solution, 30% H_2O_2 solution, ice. Second, the reaction principle 2HBr + H_2O_2 = Br_2 + 2H_2O; Br_2 + 2NaOH = H_2O + NaBr + NaBrO Third, the experimental device Experimental device shown in the attached figure. Figure experimental device Fourth, the experimental steps 1.400 mL large beaker containing ice with NaOH solution (ice water bath). 2. H_2O_2 installed in the conical flask, the conical flask into a large beaker so that the bottom with the cup flush, beaker level just to the flask flask neck. It