有意听风
幼苗
共回答了12个问题采纳率:75% 举报
①硫化钾溶液 K2S+H2S--->2KHS K2S+Br--->2KBr+S
②二氧化硫 SO2+2H2O--->2H2O+3S SO2+Br2+2H2O--->H2OS4+2HBr
③硫酸铜溶液 CuSO4+H2S--->CuS+H2SO
④硝酸银溶液 2AgNO3+H2S--->Ag2S+2HNO3 AgNO3+Br2+H2O--->AgBr+HNO3+HBrO
⑤小苏打溶液 NaHCO3+Br2--->NaBr+CO2+HBrO
⑥烧碱溶液 2NaOH+H2S--->Na2S+2H2O 2NaOH+Br2--->NaBr+NaBrO+H2O
⑦NaHS溶液 NaHS+Br2--->NaBr+S+HBr
⑧Na2SO3溶 Na2SO3+H2S--->NaHSO3+NaHS Na2SO3+Br2+H2O--->2NaBr+H2SO4
答案B
⑧Na2SO3溶液也可以
1年前
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